Off Guard Question

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olpre4: Newbie | Next Rank: 10 Posts; Posts: 7; Joined: Sun Aug 10, 2008 6:04 pm

by olpre4 » Wed Dec 03, 2008 6:49 pm

If a, b, and c are integers, what is the value of a?

(1) (a-7)(b-7)(c-7) = 0
(2) bc = 18

Data Sufficiency Question
Answer: C Both

How should this problem be solved?

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Source: Beat The GMAT — Data Sufficiency | Wed Dec 03, 2008 6:49 pm

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

by cramya » Wed Dec 03, 2008 7:27 pm

Stmt I

a coulbe be 7 b could be 7 c could be 7

We dont know if all are 7 or which one is 7

INSUFF

Stmt II

bc=18

No info about a

INSUFF

Stmt I and II together

a has to be 7

if bc=18 the neither b nor c can be 7 since b and c are integers

a=7

One definite answer.

SUFF

C)

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olpre4: Newbie | Next Rank: 10 Posts; Posts: 7; Joined: Sun Aug 10, 2008 6:04 pm

Thanks

by olpre4 » Wed Dec 03, 2008 8:06 pm

I cannot believe I did not see that.

Thanks

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