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Can anyone get this tricky math problem?

F

Frisco

macrumors 68020
Original poster
Sep 24, 2002
2,475
69
Utopia
Just for fun, not for class. I can't get it.

Good luck with this and have fun! This is a 5th grade math problem.
If you can't stand word math problems, just delete now. If you can open the
spreadsheet, you'll see it's a very small list of people who have gotten
the correct number. This is not a trick question. This is a real math
problem so don't say that a bus has no legs.


There are 7 girls in a bus

Each girl 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?


The number of legs is the password to unlock the Excel sheet. (Do not have to spell out #)
If you open it.

Spreadsheet
 
Answer this question honestly...

If you were a spammer, and somebody asked you if you were a spammer would you reply, "no I am not a spammer" ?
 
mactastic1971 said:
Answer this question honestly...

If you were a spammer, and somebody asked you if you were a spammer would you reply, "no I am not a spammer" ?
Click to expand...

I have been a member since 2002 and just start spamming now? Answer the question or move on :rolleyes:
 
I got 9604.

7 girls x 7 backpacks x 7 big cats = 343 big cats x 7 little cats = 2401

2401 x 4 legs each = 9604

...but it's wrong. :confused:

EDIT: forgot the girls. 2401 + 7 = 2408 x 4 = 9632 ...but that's wrong too! :D
 
The answer is 10990

7 girls * 2 legs each = 14 legs

7 backpacks per girl = 49 backpacks
7 large cats per backpack = 343 large cats = 1372 legs on the large cats

7 small cats per large cat = 2401 small cats = 9604 legs in the small cats.

Total legs = 9604+1372+14 = 10990
 
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swiftaw said:
The answer is 10990

7 girls * 2 legs each = 14 legs

7 backpacks per girl = 49 backpacks
7 large cats per backpack = 343 large cats = 1372 legs on the large cats

7 small cats per large cat = 2401 small cats = 9604 legs in the small cats.

Total legs = 9604+1372+14 = 10990
Click to expand...

Thank you so much!!! I would have never gotten it.

ps: No spam here
 
I don't see why this is at all hard. It seems very simple to me.

7 girls --> 14 legs
7x7 = 49 backpacks
49x7 = 343 big cats --> 1372 legs
343x7 = 2401 little cats --> 9604 legs
14+1372+9604 = 10990 legs in total
 
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dobbin said:
I don't see why this is at all hard. It seems very simple to me.

7 girls --> 14 legs
7x7 = 49 backpacks
49x7 = 343 big cats --> 1372 legs
343x7 = 2401 little cats --> 9604 legs
14+1372+9604 = 10990 legs in total
Click to expand...

Well it was very hard for me. I was never good at math.

ps: I was multiplying in the wrong order: Big cats--little cats really confused me.
 
That puzzle sounds like yet another variation on this classic, thought to have originated in 1650 BC!

How 'bout this puzzle? -

A bookshelf has three encyclopedia volumes: A-I, J-R, and S-Z. They are in the usual order, left to right on the shelf. The covers are 1/16" thick. Each book has pages numbered 1 to 1000. Each sheet of paper is 1/250 of an inch thick.

If a bookworm chews its way from page 1 of the A-I volume through page 1000 of the S-Z volume, how far did it travel?

(You may decide whether or not the bookworm ate the starting page and the ending page; use whichever assumption makes your computation easier.)
 
Doctor Q said:
That puzzle sounds like yet another variation on this classic, thought to have originated in 1650 BC!

How 'bout this puzzle? -

A bookshelf has three encyclopedia volumes: A-I, J-R, and S-Z. They are in the usual order, left to right on the shelf. The covers are 1/16" thick. Each book has pages numbered 1 to 1000. Each sheet of paper is 1/250 of an inch thick.

If a bookworm chews its way from page 1 of the A-I volume through page 1000 of the S-Z volume, how far did it travel?

(You may decide whether or not the bookworm ate the starting page and the ending page; use whichever assumption makes your computation easier.)
Click to expand...

6.25 inches
 
swiftaw said:
6.25 inches
Click to expand...

Agreed.

1000 pages = 500 sheets. 1 page on one side, 1 page on the other.
The worm chews through 500 sheets in the A-I book, then the cover.
It then chews through the J-R front cover, 500 sheets, and the back cover.
Then the S-Z cover, 500 sheets, and it stops dead.
 
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