7’s complement of 432 is _________________ A. 432 B. 543 C. 345

7s-complement-of-432-is-a-432-b-543-c-345

7’s complement of 432 is _________________

A. 432

B. 543

C. 345

D. 777

This question was posed to me in a national level competition.

The question is from Complements in division Computer Arithmetic of Computer Fundamentals

The correct option is C. 345

For explanation: To find the 7’s complement of any number, we simply subtract 7 from each of the bits.

Here, 777-432=345. So, the 7’s complement is 345.