Monday, January 12, 2009

Math question

I saw this question on the internet and found it interesting.


There are 7 boys in a bus. Each boy has 7 backpacks. In each backpack, there are 7 big cats. For every big cat there are 7 little cats. Question: How many legs are there in the bus?

25 comments:

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  2. Russell, hope you are feeling better now. By the way, I'll give a small prize to the first person who gets the right answer.

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  6. 7 boys x 2 legs = 14 legs
    1 boy = 7 backpacks
    7 boys = 49 backpacks
    1 backpack = 7 cats
    49 backpacks = 343 cats
    343 cats = 1,372 legs
    1 cat = 7 kittens
    343 cats = 2,401 kittens
    2,401 kittens = 9,604 legs
    14 + 1,372 + 9,604 legs = 10,990 legs
    There are 10,990 legs altogether.
    Is the answer correct? /:p

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  7. It's so hard to do this question!

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  10. My new answer!

    7 boys x 2 legs = 14 legs
    7 boys x 7 backpacks = 49 backpacks
    49 backpacks x 7 cats = 343 cats
    343 cats x 7 kittens = 2401 cats
    2401 cats x 4 legs = 9604 legs
    9604 legs + 14 legs = 9618!

    'Is it correct,anyway?'

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  11. uhmm... I think i am wrong it should be
    boy:7x2=14 legs
    backpacks:7x7=49
    big cats:49x7=343
    small cats:343x7=2401
    2401+343=2744
    2744x4=10 976
    10 976+14=10 990
    There are 10 990 legs in the bus.

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  12. Anyway, Mr Tan are you sure a boy can take so many backpacks with him if not my answer will be 14 legs only!!! Please reply!!!QUICK.

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  13. congrats Akmal, you got the right answer

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  16. 7 boys x 2 legs = 14 legs
    1 boy = 7 backpacks
    7 boys = 49 backpacks
    1 backpack = 7 cats
    49 backpacks = 343 cats
    343 cats = 1,372 legs
    1 cat = 7 kittens
    343 cats = 2,401 kittens
    2,401 kittens = 9,604 legs
    14 + 1,372 + 9,604 legs = 10,990 legs
    There are 10,990 legs altogether.

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  18. Well,This is Weijian's brother here.(weisheng)

    RokAkmalz,Your indeed correct.
    You're smart man,Akmalz.

    7 x 7 = 49 ( total backpacks)
    49 x 7 = 343 ( total big cats)
    343 x 7 = 2401 (total small cats)

    343 x 4 = 1372 (total big cats leg)
    2401 x 4 = 9604 (total small cats leg)
    7 x 2 = 14 (total human's leg)

    SUM OF ALL LEGS : 10 990

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