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Quantitative Aptitude

Divisibility Rule for Composite Numbers

Q. If the num...

Question

Q. If the number 357X25Y is divisible by 3 and 5, then the missing digits in the unit’s place and thousands place respectively are: which of the following digits can replace X and Y?

A

0, 6

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B

6, 5

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C

4, 5

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D

None of these

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Solution

The correct option is B 6, 5
3 + 5 + 7 + X+ 2 + 5 +Y = 17 + X + Y is divisible by 3
Only if X is 6 and Y is 5will the number be divisible by 3
Also if X is 6 and Y is 5 the number is divisible by 5

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