Grade 7 Math Blogorama at Sargent Park

Thursday, February 16, 2006

Assignment due Friday February 17th

There have been some students submitting great Brain teasers over the past few weeks and I have collected some of my favorites for everyone to solve.

Your assignment is to solve one of the these four brain teasers that have been submitted by your fellow students.

Remember you only have to try to solve on of the brain teasers to earn your blogger marks for the week

TEASER #1 (Submitted by Renegade, modified by Mr. Reece)

There are three cats on one side of the river and three dogs on the other side. The dogs and cats wish to switch sides of the river. You must therefore transport the dogs and cats using your boat to the opposite sides of the river. Now here are the problem that you must deal with

1 - You can never have more dogs than cats on one side of the river as the dogs will eat the cat.

2- You must always have at least one dog or cat with you everytime that you cross the river.

3 - You can never have more than two animals in the boat at the same time.


TEASER #2 (Submitted by Brandon)
Your objective is to buy exactly 100 farm animals with exactly 100 dollars. You must buy at least 1 of each animal. You may need some paper!

The Costs:
Cows: $10 each
Pigs: $ 3 each
Chickens: $0.50 each


TEASER #3 (posted by Jay)
There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?


TEASER #4 (Submitted by Ardia)
The fish market is selling different kinds of fish. But there aren't any prices listed. You ask about the prices, but all the seller will tell you is this:
• A pound of salmon and a pound of bass are $12.
• A pound of bass and a pound of swordfish are $10.
• A pound of salmon and a pound of swordfish are $8.
• A pound of swordfish and a pound of catfish are $5.
• Each price per pound is a whole-dollar amount.

What is the price of each fish?


To answer any of these 4 brain teasers please send a comment to this post stating which question you are answering and your answer. If you have already answered one of these brain teasers or you are the original author you must answer a different brain teaser.

Happy puzzle solving!

Mr. R

33 Comments:

  • teaser 1

    There are three cats on one side of the river and three dogs on the other side.
    The dogs and cats wish to switch sides of the river. You must therefore transport
    the dogs and cats using your boat to the opposite sides of the river.
    Now here are the problem that you must deal with

    1 - You can never have more dogs than cats on one side of the river as the dogs will eat the cat.

    2- You must always have at least one dog or cat with you everytime that you cross the river.

    3 - You can never have more than two animals in the boat at the same time.


    step1 Take 1 dog across to the other side
    step2 Take 2 cats across to the other side
    step3 Take 2 dog across to the other side
    step4 Take the last cat across to the other side

    teaser 2

    Your objective is to buy exactly 100 farm animals with exactly 100 dollars.
    You must buy at least 1 of each animal.
    You may need some paper!

    The Costs:
    Cows: $10 each
    Pigs: $ 3 each
    Chickens: $0.50 each



    you buy 9 cows 3 pig and 2 chickens


    teaser3

    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?


    Jane ran the slowest

    teaser4

    The fish market is selling different kinds of fish. But there aren't any prices listed.
    You ask about the prices, but all the seller will tell you is this:
    • A pound of salmon and a pound of bass are $12.
    • A pound of bass and a pound of swordfish are $10.
    • A pound of salmon and a pound of swordfish are $8.
    • A pound of swordfish and a pound of catfish are $5.
    • Each price per pound is a whole-dollar amount.

    What is the price of each fish?



    catfish is $2
    sword fish is $3
    salmon is $5
    bass is $7

    By Blogger Levon, at 2/07/2006 9:29 PM  

  • TEASER #3
    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the length of the football field in 1 minute. Jill runs the same length but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?

    Answer:
    Jill - 30 seconds
    Jen - 50 seconds
    Alison - 55 seconds
    Jane - 1 minute

    By Blogger tears_77, at 2/07/2006 11:29 PM  

  • Teaser # 4

    Salmon = $5.00
    Swordfish = $3.00
    Bass = $7.00
    Catfish = $2.00

    By Blogger Josh, at 2/08/2006 4:32 PM  

  • Teaser # 4

    Salmon = $5.00
    Swordfish = $3.00
    Bass = $7.00
    Catfish = $2.00

    By Blogger Josh, at 2/08/2006 4:33 PM  

  • The way you solve Brain teaser #1 is if the cats are on the left then they to go to the right. So the dogs are on the right and they to go to the left.The way I did it was like this...

    ccc -------------- boat ddd
    ccc <------<-----<--- d dd
    cd cc----->----->----> dd
    cd <------<-----<---dd cc cd cd----->----->----> ccd
    ccd <------<-----<----d cd
    ccdd cc----->----->----> cd
    dd <------<-----<----d cccd
    ddd boat--------------- ccc

    By Blogger Candy, at 2/08/2006 5:13 PM  

  • Hello Mr.Reece,

    I am answering brain teaser #3.

    (These are names and the times not in order)

    Jane 60 seconds
    Jill 30 seconds
    Alison 55 seconds
    Jen 50 seconds

    (These are the times and names in order)

    Jill 30 seconds, Jen 50 seconds, Alison 55 seconds, Jane 60 seconds.

    By Blogger Janna_09, at 2/08/2006 7:26 PM  

  • Hello Mr.Reece,

    I am answering brain teaser #3.

    (These are names and the times not in order)

    Jane 60 seconds
    Jill 30 seconds
    Alison 55 seconds
    Jen 50 seconds

    (These are the times and names in order)

    Jill 30 seconds, Jen 50 seconds, Alison 55 seconds, Jane 60 seconds.

    By Blogger Janna_09, at 2/08/2006 7:26 PM  

  • Hello Mr.Reece,

    I am answering brain teaser #3.

    (These are names and the times not in order)

    Jane 60 seconds
    Jill 30 seconds
    Alison 55 seconds
    Jen 50 seconds

    (These are the times and names in order)

    Jill 30 seconds, Jen 50 seconds, Alison 55 seconds, Jane 60 seconds.

    By Blogger Janna_09, at 2/08/2006 7:27 PM  

  • Hi Mr.Reece it Janna, I am going to answer Brain Teaser #1

    Step 1: Start with the 3 cats on the left side and the 3 dogs on the right side of the river. the the boat starts on the right side.

    Step 2: the boat takes one dog from the right side to the left side. Now you have 2 dogs on the right side and 3 cats and 1 dog on the left side. The boat is now on the left side.

    Step 3: Take 2 cats from the left side and bring them over to the right side. You now have 1 cat and 1 dog on the left side and 2 cats and 2 dogs on the right side. The boat is on the right side.

    Step 4: Take 1 dog and 1 cat from the right side to the left side. You now have 2 cats and 2 dogs on the left side and 1 cat and 1 dog on the right side. The boat is on the left side.

    Step 5: Now take 2 cats from the left side and bring them over to the right side. You have now, 3 cats and 1 dog on the right side and 2 dogs on the left side. The boat is now on the left side.

    Step 6: This is the final step. Take 1 dog from the right side and bring it over to the left side. You now have 3 dogs on the left side and 3 cats on the right side. The boat is now on the left side.

    By Blogger Janna_09, at 2/08/2006 7:52 PM  

  • TEASER #4 (Submitted by Ardia)
    The fish market is selling different kinds of fish. But there aren't any prices listed. You ask about the prices, but all the seller will tell you is this:
    • A pound of salmon and a pound of bass are $12.
    • A pound of bass and a pound of swordfish are $10.
    • A pound of salmon and a pound of swordfish are $8.
    • A pound of swordfish and a pound of catfish are $5.
    • Each price per pound is a whole-dollar amount.

    What is the price of each fish?

    The answers are:
    salmon $5
    bass $7
    swordfish $3
    catfish $2

    By Blogger timmy, at 2/08/2006 11:21 PM  

  • TEASER #1 ANSWER:
    3 cats -------- 3dogs
    <-move 2 dogs over
    move 1 dog, 1 cat over->
    <-move 2 dogs over
    move 2 cats over->

    TEASER #3 ANSWER:
    Jill 30 seconds
    Jen 50 seconds
    Alison 55 seconds
    Jane 60 seconds

    TEASER #4 ANSWER:
    salmon $5
    bass $7
    sword $3
    cat $2

    -VANESSA 72

    By Blogger vanessa, at 2/10/2006 9:07 PM  

  • This is the answer for teaser #2 Brandons. The Answer is you buy 7 cows($70)then you buy 8 pigs ($24) then you buy 12 chickens ($6)Then when you ass them together it is 100.00. I followed the rules becsaue i did buy one of each. I got the answer buy adding how much one of each would cost and that gave me 13.50 i multiplied that by 7 and that gave me 94.50. I took that number and took it away from 100 and that gave me 5.50 then i took the pigs and the chickens to see if i could buy andymore and i could it gave me 1 more pig and 5 more chickens. thats how i got the answer.

    By Blogger jay, at 2/11/2006 12:43 PM  

  • Teaser #2

    The answer is 20 chickens, 10 pigs, and 7 cows.

    If you buy 20 chickens, you multiply 20 get $10.00, multiply 10 pigs for $30.00, and 6 cows for $60.00.

    So if you add the totals all together, you have exactly to pay $100.00 and the total of money you have on you is exactly $100.00, so thats how much you need to pay the farm.

    By Blogger xBabyBoomx, at 2/11/2006 8:53 PM  

  • Teaser # 4.
    salmon $5.00
    bass $7.00
    swordfish $3.00
    catfish $2.00

    By Blogger nathanielchangedhisnamebecauseitwasveryverylong, at 2/12/2006 2:45 PM  

  • Teaser # 4.
    salmon $5.00
    bass $7.00
    swordfish $3.00
    catfish $2.00

    By Blogger nathanielchangedhisnamebecauseitwasveryverylong, at 2/12/2006 2:45 PM  

  • 1.
    You start off with 3 cats and 3 dogs on one side. Then you move 2 dogs to the side where the cats are. Then you move 1 cat over to the side with one dog on it. Then move the 2 cats that are with the 2 dogs to the side with the 1 dog and 1 cat. Then move the last one dog to the side with the 2 dogs.
    Then you have 3 dogs on one side and 3 cats on the other.

    By Blogger Tony, at 2/13/2006 4:25 PM  

  • Brain Teaser #4

    Answer:
    A pound of salmon is worth $5.00.
    A pound of bass is worth $7.00.
    A pound of swordfish is worth $3.00.
    A pound of catfish is worth $2.00.


    How I got the answer:
    I started at $3.00 for a pound of salmon and figured that if I had that for salmon, the bass would have to be $9.00, then the Swordfish would have to be $1.00. But $1 plus $3 would equal $4 and not $8. So I followed the same process until I got to $5.00 for a pound of salmon. What made it easier was knowing that the answers would be a whole dollar amount and that it didn't include any cents.=D

    By Blogger angelic72, at 2/13/2006 6:27 PM  

  • I am doing the cats and dogs one (where you have to switch the dogs and cats to the opposite side).

    You take 2 dogs over to the cats' side. Then you bring 1 cat to the dogs' side. Then you go back and take the other 2 cats because if you leave more dogs with the cats, the dogs will eat it/them. So when you take the other 2 cats over to the other side, there will be 3 cats and 1 dog. Now you can take the last dog to the opposite side and you will have 3 dogs on what used to be the cats' side and you will have 3 cats on what used to be the dogs' side.

    Kim Thanh Vo rm 7-43 (I'm sorry if I posted this in late, my computer didn't work for awhile...sorry)

    By Blogger Smiiliies, at 2/15/2006 1:17 PM  

  • Question:3
    Answer:Jill-30 seconds
    Jen-50 seconds
    Alison-55 seconds
    Jane-1 minute

    By Blogger Matthew_23, at 2/16/2006 6:41 PM  

  • Question:3
    Answer:Jill-30 seconds
    Jen-50 seconds
    Alison-55 seconds
    Jane-1 minute

    By Blogger Matthew_23, at 2/16/2006 6:42 PM  

  • Answer to Brain teaser #1
    Question:
    There are three cats on one side of the river and three dogs on the other side. The dogs and cats wish to switch sides of the river. You must therefore transport the dogs and cats using your boat to the opposite sides of the river. Now here are the problem that you must deal with

    1 - You can never have more dogs than cats on one side of the river as the dogs will eat the cat.

    2- You must always have at least one dog or cat with you everytime that you cross the river.

    3 - You can never have more than two animals in the boat at the same time.

    Answer:

    First you bring one dog and one cat into the boat. You drop off the dog ,on the cat side, and leave the cat in the boat.Then go back and get another dog. So theres again a cat and a dog in the boat. you drop off the cat and then go across the river to get another cat, then you drop it off (on the dog side). Then you take the other dog and drop them off the the other side then you drop both the dogs off and take the cat and bring it to the other cats.

    -wow that was a cool brain teaser........hahaha i used real objects =P

    By Blogger Ardia01, at 2/16/2006 7:41 PM  

  • Question:
    Your objective is to buy exactly 100 farm animals with exactly 100 dollars. You must buy at least 1 of each animal. You may need some paper!

    The Costs:
    Cows: $10 each
    Pigs: $ 3 each
    Chickens: $0.50 each

    Answer:
    you buy 5 cows for 50$ (10x5=50)
    Then 10 pigs for 30$ (3x10=30)
    Finally you buy 40 chickens for 20$ (0.50x40=20)

    so..... 30+20+50=100

    By Blogger Ardia01, at 2/16/2006 7:51 PM  

  • TEASER #3
    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?


    I answered this one before but maybe you might forget so here is my answer again:


    Fastest to Slowest:
    1) Jill because she ran the football field in 30 seconds.
    2) Jen because she ran the football field in 50 seconds.
    3) Alison because she ran the football field in 55 seconds.
    4) Jane because she ran the football field in 1 minute.

    By Blogger tears_77, at 2/16/2006 8:05 PM  

  • Question four.
    Jill is the fastest, then Jen, Alison and last is Jane.
    Jill: 30 Seconds
    Jen: 50 Seconds
    Alison: 55 Seconds
    Jane: 60 Seconds

    By Blogger Aria, at 2/16/2006 8:39 PM  

  • Answer to Teaser #3:
    Jill ran the field in 30 seconds. She is the fastest.
    Jen ran the field in 50 seconds. She is the second fastest.
    Alison ran the field in 55 seconds. She is the second slowest.
    And finally, Jane ran the field in 1 minute, which is the slowest of all.

    -Cjay

    By Blogger Cjay, at 2/17/2006 8:39 AM  

  • Teaser #3

    Jill: 30 seconds (fastest)
    Jen : 50 seconds
    Alison : 55 seconds
    Jane : 1 minute which is 60 seconds (slowest)

    How i got the answer:
    The question shows both Jill and Alison's score. 1min & 55sec. When the question says that one ran faster than the other, you just subtract the seconds they ran to the person they ran faster than.
    (ex. Jen ran faster by 5sec with Alison who ran 55sec.) 55-5=50 .

    By Blogger rozette, at 2/17/2006 6:14 PM  

  • teaser #4

    the fish market is selling different kinds of fish. But there aren't any prices listed.You ask about the prices, but all the seller will tell you is this:
    • A pound of salmon and a pound of bass are $12.
    • A pound of bass and a pound of swordfish are $10.
    • A pound of salmon and a pound of swordfish are $8.
    • A pound of swordfish and a pound of catfish are $5.
    • Each price per pound is a whole-dollar amount.

    What is the price of each fish?



    catfish is $2
    sword fish is $3
    salmon is $5
    bass is $7

    2/07/2006 9:29 PM


    tears_77 said...
    TEASER #3
    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the length of the football field in 1 minute. Jill runs the same length but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?

    Answer:
    Jill - 30 seconds
    Jen - 50 seconds
    Alison - 55 seconds
    Jane - 1 minute

    2/07/2006 11:29 PM


    Josh said...
    Teaser # 4

    Salmon = $5.00
    Swordfish = $3.00
    Bass = $7.00
    Catfish = $2.00

    2/08/2006 4:32 PM


    Josh said...
    Teaser # 4

    Salmon = $5.00
    Swordfish = $3.00
    Bass = $7.00
    Catfish = $2.00

    2/08/2006 4:33 PM


    Candy said...
    The way you solve Brain teaser #1 is if the cats are on the left then they to go to the right. So the dogs are on the right and they to go to the left.The way I did it was like this...

    ccc -------------- boat ddd
    ccc <------<-----<--- d dd
    cd cc----->----->----> dd
    cd <------<-----<---dd cc cd cd----->----->----> ccd
    ccd <------<-----<----d cd
    ccdd cc----->----->----> cd
    dd <------<-----<----d cccd
    ddd boat--------------- ccc

    2/08/2006 5:13 PM


    Janna_09 said...
    Hello Mr.Reece,

    I am answering brain teaser #3.

    (These are names and the times not in order)

    Jane 60 seconds
    Jill 30 seconds
    Alison 55 seconds
    Jen 50 seconds

    (These are the times and names in order)

    Jill 30 seconds, Jen 50 seconds, Alison 55 seconds, Jane 60 seconds.

    2/08/2006 7:26 PM


    Janna_09 said...
    Hello Mr.Reece,

    I am answering brain teaser #3.

    (These are names and the times not in order)

    Jane 60 seconds
    Jill 30 seconds
    Alison 55 seconds
    Jen 50 seconds

    (These are the times and names in order)

    Jill 30 seconds, Jen 50 seconds, Alison 55 seconds, Jane 60 seconds.

    2/08/2006 7:26 PM


    Janna_09 said...
    Hello Mr.Reece,

    I am answering brain teaser #3.

    (These are names and the times not in order)

    Jane 60 seconds
    Jill 30 seconds
    Alison 55 seconds
    Jen 50 seconds

    (These are the times and names in order)

    Jill 30 seconds, Jen 50 seconds, Alison 55 seconds, Jane 60 seconds.

    2/08/2006 7:27 PM


    Janna_09 said...
    Hi Mr.Reece it Janna, I am going to answer Brain Teaser #1

    Step 1: Start with the 3 cats on the left side and the 3 dogs on the right side of the river. the the boat starts on the right side.

    Step 2: the boat takes one dog from the right side to the left side. Now you have 2 dogs on the right side and 3 cats and 1 dog on the left side. The boat is now on the left side.

    Step 3: Take 2 cats from the left side and bring them over to the right side. You now have 1 cat and 1 dog on the left side and 2 cats and 2 dogs on the right side. The boat is on the right side.

    Step 4: Take 1 dog and 1 cat from the right side to the left side. You now have 2 cats and 2 dogs on the left side and 1 cat and 1 dog on the right side. The boat is on the left side.

    Step 5: Now take 2 cats from the left side and bring them over to the right side. You have now, 3 cats and 1 dog on the right side and 2 dogs on the left side. The boat is now on the left side.

    Step 6: This is the final step. Take 1 dog from the right side and bring it over to the left side. You now have 3 dogs on the left side and 3 cats on the right side. The boat is now on the left side.

    2/08/2006 7:52 PM


    timboy said...
    TEASER #4 (Submitted by Ardia)
    The fish market is selling different kinds of fish. But there aren't any prices listed. You ask about the prices, but all the seller will tell you is this:
    • A pound of salmon and a pound of bass are $12.
    • A pound of bass and a pound of swordfish are $10.
    • A pound of salmon and a pound of swordfish are $8.
    • A pound of swordfish and a pound of catfish are $5.
    • Each price per pound is a whole-dollar amount.

    What is the price of each fish?

    The answers are:
    salmon $5
    bass $7
    swordfish $3
    catfish $2

    2/08/2006 11:21 PM


    vanessa said...
    TEASER #1 ANSWER:
    3 cats -------- 3dogs
    <-move 2 dogs over
    move 1 dog, 1 cat over->
    <-move 2 dogs over
    move 2 cats over->

    TEASER #3 ANSWER:
    Jill 30 seconds
    Jen 50 seconds
    Alison 55 seconds
    Jane 60 seconds

    TEASER #4 ANSWER:
    salmon $5
    bass $7
    sword $3
    cat $2

    -VANESSA 72

    2/10/2006 9:07 PM


    jay said...
    This is the answer for teaser #2 Brandons. The Answer is you buy 7 cows($70)then you buy 8 pigs ($24) then you buy 12 chickens ($6)Then when you ass them together it is 100.00. I followed the rules becsaue i did buy one of each. I got the answer buy adding how much one of each would cost and that gave me 13.50 i multiplied that by 7 and that gave me 94.50. I took that number and took it away from 100 and that gave me 5.50 then i took the pigs and the chickens to see if i could buy andymore and i could it gave me 1 more pig and 5 more chickens. thats how i got the answer.

    2/11/2006 12:43 PM


    xBabyBoomx said...
    Teaser #2

    The answer is 20 chickens, 10 pigs, and 7 cows.

    If you buy 20 chickens, you multiply 20 get $10.00, multiply 10 pigs for $30.00, and 6 cows for $60.00.

    So if you add the totals all together, you have exactly to pay $100.00 and the total of money you have on you is exactly $100.00, so thats how much you need to pay the farm.

    2/11/2006 8:53 PM


    nathanielsdisplaynameistheboogeymanwhoeatsdiseases said...
    Teaser # 4.
    salmon $5.00
    bass $7.00
    swordfish $3.00
    catfish $2.00

    2/12/2006 2:45 PM


    nathanielsdisplaynameistheboogeymanwhoeatsdiseases said...
    Teaser # 4.
    salmon $5.00
    bass $7.00
    swordfish $3.00
    catfish $2.00

    2/12/2006 2:45 PM


    Tony said...
    1.
    You start off with 3 cats and 3 dogs on one side. Then you move 2 dogs to the side where the cats are. Then you move 1 cat over to the side with one dog on it. Then move the 2 cats that are with the 2 dogs to the side with the 1 dog and 1 cat. Then move the last one dog to the side with the 2 dogs.
    Then you have 3 dogs on one side and 3 cats on the other.

    2/13/2006 4:25 PM


    angelic72 said...
    Brain Teaser #4

    Answer:
    A pound of salmon is worth $5.00.
    A pound of bass is worth $7.00.
    A pound of swordfish is worth $3.00.
    A pound of catfish is worth $2.00.


    How I got the answer:
    I started at $3.00 for a pound of salmon and figured that if I had that for salmon, the bass would have to be $9.00, then the Swordfish would have to be $1.00. But $1 plus $3 would equal $4 and not $8. So I followed the same process until I got to $5.00 for a pound of salmon. What made it easier was knowing that the answers would be a whole dollar amount and that it didn't include any cents.=D

    2/13/2006 6:27 PM


    Smiiliies said...
    I am doing the cats and dogs one (where you have to switch the dogs and cats to the opposite side).

    You take 2 dogs over to the cats' side. Then you bring 1 cat to the dogs' side. Then you go back and take the other 2 cats because if you leave more dogs with the cats, the dogs will eat it/them. So when you take the other 2 cats over to the other side, there will be 3 cats and 1 dog. Now you can take the last dog to the opposite side and you will have 3 dogs on what used to be the cats' side and you will have 3 cats on what used to be the dogs' side.

    Kim Thanh Vo rm 7-43 (I'm sorry if I posted this in late, my computer didn't work for awhile...sorry)

    2/15/2006 1:17 PM


    Matthew_23 said...
    Question:3
    Answer:Jill-30 seconds
    Jen-50 seconds
    Alison-55 seconds
    Jane-1 minute

    2/16/2006 6:41 PM


    Matthew_23 said...
    Question:3
    Answer:Jill-30 seconds
    Jen-50 seconds
    Alison-55 seconds
    Jane-1 minute

    2/16/2006 6:42 PM


    Ardia01 said...
    Answer to Brain teaser #1
    Question:
    There are three cats on one side of the river and three dogs on the other side. The dogs and cats wish to switch sides of the river. You must therefore transport the dogs and cats using your boat to the opposite sides of the river. Now here are the problem that you must deal with

    1 - You can never have more dogs than cats on one side of the river as the dogs will eat the cat.

    2- You must always have at least one dog or cat with you everytime that you cross the river.

    3 - You can never have more than two animals in the boat at the same time.

    Answer:

    First you bring one dog and one cat into the boat. You drop off the dog ,on the cat side, and leave the cat in the boat.Then go back and get another dog. So theres again a cat and a dog in the boat. you drop off the cat and then go across the river to get another cat, then you drop it off (on the dog side). Then you take the other dog and drop them off the the other side then you drop both the dogs off and take the cat and bring it to the other cats.

    -wow that was a cool brain teaser........hahaha i used real objects =P

    2/16/2006 7:41 PM


    Ardia01 said...
    Question:
    Your objective is to buy exactly 100 farm animals with exactly 100 dollars. You must buy at least 1 of each animal. You may need some paper!

    The Costs:
    Cows: $10 each
    Pigs: $ 3 each
    Chickens: $0.50 each

    Answer:
    you buy 5 cows for 50$ (10x5=50)
    Then 10 pigs for 30$ (3x10=30)
    Finally you buy 40 chickens for 20$ (0.50x40=20)

    so..... 30+20+50=100

    2/16/2006 7:51 PM


    tears_77 said...
    TEASER #3
    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?


    I answered this one before but maybe you might forget so here is my answer again:


    Fastest to Slowest:
    1) Jill because she ran the football field in 30 seconds.
    2) Jen because she ran the football field in 50 seconds.
    3) Alison because she ran the football field in 55 seconds.
    4) Jane because she ran the football field in 1 minute.

    2/16/2006 8:05 PM


    Taylor Le said...
    Question four.
    Jill is the fastest, then Jen, Alison and last is Jane.
    Jill: 30 Seconds
    Jen: 50 Seconds
    Alison: 55 Seconds
    Jane: 60 Seconds

    2/16/2006 8:39 PM


    Cjay said...
    Answer to Teaser #3:
    Jill ran the field in 30 seconds. She is the fastest.
    Jen ran the field in 50 seconds. She is the second fastest.
    Alison ran the field in 55 seconds. She is the second slowest.
    And finally, Jane ran the field in 1 minute, which is the slowest of all.

    -Cjay

    2/17/2006 8:39 AM


    There have been some students submitting great Brain teasers over the past few weeks and I have collected some of my favorites for everyone to solve.

    Your assignment is to solve one of the these four brain teasers that have been submitted by your fellow students.

    Remember you only have to try to solve on of the brain teasers to earn your blogger marks for the week

    TEASER #1 (Submitted by Renegade, modified by Mr. Reece)

    There are three cats on one side of the river and three dogs on the other side. The dogs and cats wish to switch sides of the river. You must therefore transport the dogs and cats using your boat to the opposite sides of the river. Now here are the problem that you must deal with

    1 - You can never have more dogs than cats on one side of the river as the dogs will eat the cat.

    2- You must always have at least one dog or cat with you everytime that you cross the river.

    3 - You can never have more than two animals in the boat at the same time.


    TEASER #2 (Submitted by Brandon)
    Your objective is to buy exactly 100 farm animals with exactly 100 dollars. You must buy at least 1 of each animal. You may need some paper!

    The Costs:
    Cows: $10 each
    Pigs: $ 3 each
    Chickens: $0.50 each


    TEASER #3 (posted by Jay)
    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?


    TEASER #4 (Submitted by Ardia)
    The fish market is selling different kinds of fish. But there aren't any prices listed. You ask about the prices, but all the seller will tell you is this:
    • A pound of salmon and a pound of bass are $12.
    • A pound of bass and a pound of swordfish are $10.
    • A pound of salmon and a pound of swordfish are $8.
    • A pound of swordfish and a pound of catfish are $5.
    • Each price per pound is a whole-dollar amount.

    What is the price of each fish?


    To answer any of these 4 brain teasers please send a comment to this post stating which question you are answering and your answer. If you have already answered one of these brain teasers or you are the original author you must answer a different brain teaser.

    Happy puzzle solving!

    Mr. R
    posted by Mr. Reece at 6:43 PM on Feb 16 2006

    teaser #4

    the fish market is selling different kinds of fish. But there aren't any prices listed. You ask about the prices, but all the seller tells you is this:

    A pound of salmon and a pound of bass are $12

    A pond of bass and a pound of swordfish are $10

    A pound of salmon and a pound of swordfish are $8

    A pound of swordfish and a pound of catfish are $5
    Each price is a a whole-dollar amount

    What is the price of each amount?

    The prices are
    salmon - $5.00
    swordfish - $3.00
    bass - $7.00
    catfish - $2.00

    By Blogger Faith Anderson, at 2/18/2006 12:28 PM  

  • In order from fastest to slowest, here are the runners from teaser #3.
    1. Jill: 30 sec
    2. Jen: 50 sec
    3. Alison: 55 sec
    4. Jane: 1 min

    By Blogger michael_841, at 2/19/2006 5:47 PM  

  • There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?

    jill -30sec.
    jen -50sec.
    allison-55sec.
    jane -60sec.

    lalalalalalala...

    By Blogger -rain-, at 2/20/2006 6:29 PM  

  • There are three cats on one side of the river and three dogs on the other side.
    The dogs and cats wish to switch sides of the river. You must therefore transport
    the dogs and cats using your boat to the opposite sides of the river.
    Now here are the problem that you must deal with

    1 - You can never have more dogs than cats on one side of the river as the dogs will eat the cat.

    2- You must always have at least one dog or cat with you everytime that you cross the river.

    3 - You can never have more than two animals in the boat at the same time.

    now.....

    the answer...

    take a cat w/ you across the river to the other side.

    take a dog w/ you across the river to the other side.

    take a cat w/ you acroos the river to the other side.

    take a dog w/ you across the river to the other side.

    take a cat w/ you on the boat to the other side.
    take a dog w/ you on the boat to the other side.

    who said you have to take the boat all the tme...

    By Blogger -rain-, at 2/20/2006 6:42 PM  

  • hi... can you post some riddles or trick questions from your book...

    thanks...

    By Blogger -rain-, at 2/20/2006 7:00 PM  

  • i know this is a little late but i couldn't get to my coputer for a couple of days...soooo..yeah ..

    teaser #3

    There is a group of friends wanting to know who is the fastest runner out of all of them. Jane runs the lenghth of the football field in 1 minute. Jill runs the same lenghth but she is 30 seconds faster then Jane. The last two people who ran where Alison and Jen. They ran the same length at the same time but Jen ran 5 seconds faster then Alison. Alison ran the lenghth of the field in 55 seconds. Can you list the times from fastest to slowest?


    1. jill - 30 seconds
    2. jen - 50 seconds
    3. alison - 55 seconds
    4. jane - 1 minute

    By Blogger ecargyram, at 2/23/2006 5:47 PM  

  • • A pound of salmon and a pound of bass are $12.
    • A pound of bass and a pound of swordfish are $10.
    • A pound of salmon and a pound of swordfish are $8.
    • A pound of swordfish and a pound of catfish are $5.
    • Each price per pound is a whole-dollar amount.

    What is the price of each fish?

    Salmon $7

    Bass $5

    Swordfish $3

    Catfish $2

    By Blogger tennis boy, at 3/03/2006 7:00 PM  

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