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Question

The number of divisors of N=27.33.54 divisible by 6 but not by 15 is

A
24
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B
21
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C
30
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D
60
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Solution

The correct option is B 21
N=27.33.54
number of divisors divisible by 6 and not by 15 can be written as
=2.3(26.32.54) total ways =7×3=21

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