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Quantitative Aptitude

Highest Power of a Number

The highest p...

Question

The highest power of 7 that completely divides 80! is:

A

12

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B

13

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C

14

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D

15

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Solution

The correct option is A 12
No of 7's in $80! = [\frac{80}{7}] + [\frac{80}{49}] =$ 11+1=12.
Option (a) is correct.

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