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# this is a variation i made on a gmetprep data sufficiency

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Senior Manager
Joined: 23 Jun 2006
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this is a variation i made on a gmetprep data sufficiency [#permalink]  28 Apr 2007, 15:40
this is a variation i made on a gmetprep data sufficiency question (i.e. it has a twist, the original didn't have...), try to solve and see if you find the twist... enjoy.

if the sign & denotes either substraction or multiplication, and k is an integer. what is the value of 2 & k ?

1) 5 & k = 3
2) 2 & 0 = k
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Current Student
Joined: 22 Apr 2007
Posts: 1097
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2&k

(1) Let & mean -:
5-k = 3 => k = 2
So, 2&k = 0

Let & mean *:
5*k = 3 => k = 3/5
Not possible, so & means -

So, 2&k = 0. Sufficient

(2) Let & mean -:
2-0 = k => k = 2
So, 2&k = 0

Let & mean *:
2*0 = k => k = 0
So, 2&k = 0

So, in either case, 2&k = 0. Sufficient

So, either statement is sufficient.
Manager
Joined: 21 Mar 2007
Posts: 50
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hey thanks . this was a real twister
got it correct this time

yes either statement is sufficient
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