Q. The 8’s complement of the number 240 is:

A
537
B
538
C
540
D
648
Solution:

8’s complement of a number is 1 added to it’s 7’s complement number.

7’s complement of 240 is

7 7 7 – 240 = 5 3 7 .

Now add 1 : 537 1 = 538.

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