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Question

How many of the following numbers are divisible by 132?
264,396,462,792,968,2178,5184,6336

A
6
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B
4
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C
5
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D
8
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Solution

The correct option is C 4
Here 3, 4 and 11 are pair wise co-prime numbers.
132=3×4×11. Also 3,4 and 11 are factors of 132. Hence if a number is divisible by 3, 4 and 11, the number will be divisible by their product 132 also.
If a number is not divisible by 3 or 4 or 11, it is not divisible by 132.
264 is divisible by 3, 4 and 11; So, 264 is divisible by 132
396 is divisible by 3, 4 and 11; So, 396 is divisible by 132
462 is divisible by 3 and 11, but not divisible by 4; So, 462 is not divisible by 132
792 is divisible by 3, 4 and 11; So, 792 is divisible by 132
968 is divisible by 4 and 11, but not divisible by 3; So, 968 is not divisible by 132
2178 is divisible by 3 and 11, but not divisible by 4; So, 2178 is not divisible by 132
5184 is divisible by 3 and 4, but not divisible by 11; So, 5184 is not divisible by 132
6336 is divisible by 3, 4 and 11; So, 6336 is divisible by 132
Hence, only 264, 396 ,792 and 6336 are divisible by 132. So the answer is 4.

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