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Quantitative Aptitude

Divisibility Rule for Composite Numbers

Q. If 1 X 548...

Question

Q. If 1X548 is divisible by 3, which of the following digits can replace X?

A

0.0

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B

2

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C

7

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D

9

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Solution

The correct option is D 9
1 + x + 5 + 4 + 8 = 18 + x is divisible by 3
Only if x is 9 will the number be divisible by 3

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