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Question

By which of the following numbers is 392 divisible?



A

9

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B
3
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C
2
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D
4
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Solution

The correct options are
C 2
D 4

A number is divisible by 3 or 9 if the sum of its digits is divisible by 3 or 9 respectively.

Here, sum of digits = 3 + 9 + 2 = 14 which is not divisible by either 3 or 9. Hence, the number is not divisible by 3 and 9.

Being an even number, the given number is divisible by 2.

A number is divisible by 4 if the number formed by the last two digits are divisible by 4.
In 392, 92 which is divisible by 4. Hence, the number is also divisible by 4.


Mathematics

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