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Q.

If the number 27x5 is divisible by 9 then  the largest digit to replace  ‘x’ is           

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a

7

b

1

c

9

d

4

answer is C.

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Detailed Solution

By divisibility rule of 9

  2+7+x+5=9 multiple.

14+x=9 multiple

Next 9 multiple is 18

14+x=18⇒x=4

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