another remaider question from Princeton GMAT Math Bible

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amyyoung999: Junior | Next Rank: 30 Posts; Posts: 11; Joined: Mon Dec 08, 2008 4:39 pm

another remaider question from Princeton GMAT Math Bible

by amyyoung999 » Mon Dec 15, 2008 1:21 pm

This is another remaider question from Princeton GMAT Math I don't know
how to solve it.
Can any body help me?

2. Tony has a box of apples. How many apples are in the box?

a. If he gave the apples to 7 friends equally, there are 3 apples left
b. If he gave the apples to 4 friends equally, there are 2 apples left

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Source: Beat The GMAT — Data Sufficiency | Mon Dec 15, 2008 1:21 pm

cramya: Legendary Member; Posts: 2467; Joined: Thu Aug 28, 2008 6:14 pm; Thanked: 331 times; Followed by:11 members

by cramya » Mon Dec 15, 2008 10:32 pm

Thinking more I think its E)

Many valuies satisfy this condition

10,38 ....

INSUFF

If possible please post official answers wiht spoiler function when posting questions.
OA :whatever the oa is

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logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pm; Thanked: 237 times; Followed by:25 members; GMAT Score:730

Re: another remaider question from Princeton GMAT Math Bible

by logitech » Mon Dec 15, 2008 10:54 pm

A = 7x+3 Insuf
A = 4Y+2 Insuf

7X+3=4Y+2

4Y-7X=1

(x,y) = (1,2) or ( 5,9) and etc...will satisfy this equation. Hence E

LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"

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PVtrainer: Newbie | Next Rank: 10 Posts; Posts: 3; Joined: Fri Dec 12, 2008 10:46 pm; Location: India

Re: another remaider question from Princeton GMAT Math Bible

by PVtrainer » Tue Dec 16, 2008 3:54 am

amyyoung999 wrote:This is another remaider question from Princeton GMAT Math I don't know
how to solve it.
Can any body help me?

2. Tony has a box of apples. How many apples are in the box?

a. If he gave the apples to 7 friends equally, there are 3 apples left
b. If he gave the apples to 4 friends equally, there are 2 apples left

From statement a and b we have the relation of the form
28N + 10 will satisfy both the conditions where N is a whole number. So we can't get the unique answer.
Hence option E is the correct answer