1. The 9's complement of 381 is

- Option : C
- Explanation : The 9's complement of a number is calculated by subtracting 9 from every digit of that number.

Now, in this case, (9-3)(9-8)(9-1) gives us the 9's complement which is (6)(1)(8) i.e. 618.

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2. If (12A7C )16 = (X)8 then value of X is

- Option : A
- Explanation :

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