Exam Maths Puzzle Numerical Ability Permutation and Combination

If 146! is divisible by 5^n then find the maximum value of n

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Exam Other Question

242!
How many Zeros ?
a) 54
b) 58
c) 64
d) 72
If f(f(n)) + f(n) = 2n+3, f(0) = 1 then f(2012) = ?