| | Question 1

Question 1 : Find the number of zeroes in 155!
(A) 30
(B) 34
(C) 38
(D) 44


Answer: (C)

Explanation: Solution: Multiplication of 2×5 results into 10. So number of zeroes depend on the number of pairs of 2 and 5.
In any factorial, number of 5’s is lesser than the number of 2’s. So, we need to count the maximum power of 5 in 155!
[155/5] + [155/5²] + [155/5³]
=31 + 6 +1
=38
Hence, number of zeroes is 38.

Quiz of this Question
Please comment below if you find anything wrong in the above post