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a and b are integers, a is even, what is the value of a - b?

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Manager
Joined: 28 Mar 2006
Posts: 158
Followers: 1

Kudos [?]: 2 [0], given: 0

a and b are integers, a is even, what is the value of a - b? [#permalink]  15 May 2006, 08:39
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a and b are integers, a is even, what is the value of a - b?
1)a<3
2)a/b = 2/7
VP
Joined: 29 Dec 2005
Posts: 1349
Followers: 7

Kudos [?]: 30 [0], given: 0

Re: DS a n b [#permalink]  15 May 2006, 09:18
itishaj wrote:
a and b are integers, a is even, what is the value of a - b?
1)a<3
2)a/b = 2/7

E. a could be 2, -2, -4, -12, or so on. b aso could be 7, -7, -14, -21 nor so on.......
Director
Joined: 16 Aug 2005
Posts: 947
Location: France
Followers: 1

Kudos [?]: 10 [0], given: 0

a and b are integers, a is even, what is the value of a - b?
1)a<3
2)a/b = 2/7

1. Not sufficient as we do not know B

2. not sufficient as a can be 2, 4, 6, ... and b can be 7, 14, 21, ...

Combining both together:
a can be 2 for a/b to be 2/7
or can be -2 (and b -7)...

So E
Manager
Joined: 28 Mar 2006
Posts: 158
Followers: 1

Kudos [?]: 2 [0], given: 0

OA is E.
While solving I had missed the fact that a can be negative
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