aashaybaindurgmat wrote:

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

(1) a < 3

(2) \(\frac{a}{b} = \frac{2}{7}\)

(Source: Princeton Review GMAT Test 6)

Statement 1: nothing mentioned about \(b\). Hence

insufficientStatement 2: implies \(a=\frac{2b}{7}\), as \(a\) and \(b\) are integers so \(b\) has to be a multiple of \(7\)

if \(b=7\) then \(a=2\) and if \(b=14\), \(a=4\), So multiple values of \(a\) & \(b\) possible. hence

insufficientCombining 1 & 2 we know \(a<3\) and \(b\) is a multiple of \(7\)

so if \(b=7\), \(a =2\) and \(a-b=-5\)

but if \(b=-7\), \(a=-2\) and \(a-b=5\)

So multiple values possible.

Option

E