# Number System Quiz - Number System MCQ

1:

The 9's complement of 381 is

 A. 355 B. 508 C. 618 D. 390 Answer Report Discuss 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. Click on Discuss to view users comments. Write your comments here:
2:

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

 A. 225174 B. 425174 C. 17325 D. 225714 Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here:
3:   The 2's complements of binary number 010111.1100 is
 A. 101001.1100 B. 101000.0100. C. 010111.0011 D. 101011.0011 Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:

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