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IMO 2. 1g.shankaran wrote:for any +ve integer n, the length of n is defined as the number of prime factors whose product is n. For example, the length of 75 is 3, since 75 = 3 X 5 X 5. how many two-digit integers have length 6?
1. none
2. 1
3. 2
4. 3
5. 4
vinayreguri wrote:Ans 2. 2 numbers in total.
2*2*2*2*2*2=64
2*2*2*2*2*3=96
I see these questions in MGMAT forums also.
Slow down, score more. It's always good to spend an extra 10 seconds taking another look at your logical path before committing to an answer - try to pick up on hidden assumptions that you're making (such as that fact that the prime factors don't need to all be the same, in the case above).Calvin123 wrote:vinayreguri wrote:Ans 2. 2 numbers in total.
2*2*2*2*2*2=64
2*2*2*2*2*3=96
I see these questions in MGMAT forums also.
My bad.. ans must be 2, i did silly calculation mistake
