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# If a,b and c are integers, what is the value of a? 1)

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Senior Manager
Joined: 07 Feb 2008
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If a,b and c are integers, what is the value of a? 1) [#permalink]  15 Jun 2008, 11:27
If a,b and c are integers, what is the value of a?
1) (a-7)(b-7)(c-7) = 0
2) bc = 18
Director
Joined: 23 Sep 2007
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Re: Know your alphabets [#permalink]  15 Jun 2008, 13:05
E

3 unknowns but only 2 equations.
CEO
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Re: Know your alphabets [#permalink]  15 Jun 2008, 13:11
I'll have to go with C here.

A tells us either a = 7 or b = 7 or c =7 ... so not sufficient.

B tells us nothing about A.

but together, since 18 is not divisible by 7, it tells us b not equal 7 and c not equal 7 , hence a MUST be 7

so C.

Vavali wrote:
If a,b and c are integers, what is the value of a?
1) (a-7)(b-7)(c-7) = 0
2) bc = 18
Senior Manager
Joined: 07 Feb 2008
Posts: 315
Followers: 1

Kudos [?]: 65 [0], given: 1

Re: Know your alphabets [#permalink]  15 Jun 2008, 13:13
bsd_lover wrote:
I'll have to go with C here.

A tells us either a = 7 or b = 7 or c =7 ... so not sufficient.

B tells us nothing about A.

but together, since 18 is not divisible by 7, it tells us b not equal 7 and c not equal 7 , hence a MUST be 7

so C.

Vavali wrote:
If a,b and c are integers, what is the value of a?
1) (a-7)(b-7)(c-7) = 0
2) bc = 18

Spot on bsd_lover lover The OA is C. Thanks
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Re: Know your alphabets [#permalink]  16 Jun 2008, 06:37
C for me as well.

I started with stat 2, with tells me nothing about a, so B and D are out.

From stat 1, all we know is that one of the terms in brackets works out to 0, so either a=7, b=7 , c=7. insuff.

Together, we know that neither b nor c are 0, so the only option left to make the eqn in stat 1 equal to 0 is that a=7.
Re: Know your alphabets   [#permalink] 16 Jun 2008, 06:37
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# If a,b and c are integers, what is the value of a? 1)

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