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Divisibility Rule for 9

Find the valu...

Question

Find the value of M so that M56 is divisible by 9

A

3

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B

7

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C

2

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D

4

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Solution

The correct option is B
7

For a number to be divisible by 9 , the sum of the digits of the number should be divisible by 9

If M=3, then the number is 356.
3+5+6 = 14, not divisible by 9

If M=7, then the number is 756.
7+5+6 = 18, which is divisible by 9
If M=2, then the number is 356.
2+5+6 = 13, not divisible by 9
If M=4, then the number is 356.
4+5+6 = 15, not divisible by 9

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