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Question

The exponent of 11 in the prime factorization of 300! is

A
27
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B
28
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C
29
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D
30
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Solution

The correct option is C 29
In 300!, distinct numbers divisible by
11 = |30011| = 27
Since these 27 numbers conytains, same number which can be further divisible by 11 i.e.
|2711| = 2(121 and 242)
So, total number of 11's = 27 +2 = 29
Hence exponent of 11 is 29

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