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Off Guard Question

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: — Data Sufficiency |
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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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Thanks

by olpre4 » Wed Dec 03, 2008 8:06 pm
I cannot believe I did not see that.

Thanks
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