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u shud count the number of 5s (& if needed 2s) to make a 10...sunilrawat wrote:If 60! is written out as an integer, with how many consecutive 0's will that integer end?
A. 6
B. 12
C. 14
D. 42
E. 56
I calculated 7 0's from the product of 10, 20...60 and six from 2*5, 12*15, 22*25, 32*35, 42*45, 52*55
I am missing one 0...where?
got it, thanks.rohit_gmat wrote:u shud count the number of 5s (& if needed 2s) to make a 10...sunilrawat wrote:If 60! is written out as an integer, with how many consecutive 0's will that integer end?
A. 6
B. 12
C. 14
D. 42
E. 56
I calculated 7 0's from the product of 10, 20...60 and six from 2*5, 12*15, 22*25, 32*35, 42*45, 52*55
I am missing one 0...where?
25 has 2 5s - so it actually 'contains' 2 zeros... (i.e. 25 x 4 x anyth = 100 x anything )[/b]
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