What is the highest power of 5 that divides of x = 100! = 100 x 99 x 98 x ...... x 3 x 2 x 1
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Solution
Calculating contributions of the different powers of 5 we have 10051=20,10052=4 hence the total contributions to the power of 5 is 24 or the number 100! is divisible by 524