The value of the sum +
Is
A) 0.
B) 4.
C) 6.
D) 8.
E) 12.

Question

The value of the sum  + 
Is
A) 0. 
B) 4. 
C) 6. 
D) 8. 
E) 12.

Quizplus · Accepted Answer

To add the two hexadecimal numbers, we need to add the corresponding digits and carry over whenever the sum of two digits is more than 15. Since we are working in base 16, we carry over to the next digit when the sum is 16 or higher.

Starting from the rightmost digits, we have:

6 + 8 = E (no carry)
  9 + B = 14 (carry over 1)
  F + 6 = 15 (carry over 1)
  3 + 5 = 8 (no carry)
  8 + D = 15 (carry over 1)
  A + B = 15 (carry over 1)
  E + 6 = 14 (carry over 1)
  1 + 6 = 7 (no carry)
  
Therefore, the result is 7e146d037c8_TB6578_11_TB6578_11 in hexadecimal form. In this number, we can see that the only nonzero digit in the rightmost (least significant) position is a 6, which means the last digit of the sum is 6. Therefore, the answer is C) 6.

The Value of the Sum