Number Systems – 6

 6. Indicate which of the following three binary additions are correct ?

    I. 1011 + 1010 = 10101
   II. 1010 + 1101 = 10111
   III. 1010 + 1101 = 11111

(a) I and II
(b) II and III
(c) III only
(d) II and III

Answer : (a)

Explanation : 

Rules of Binary Addition :

0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 0,  and carry 1 to the next more significant bit.

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