Add 54 (_{eight}) and 67(_{eight}) giving your answers in base eight
-
A.
111 -
B.
121 -
C.
123 -
D.
143
Correct Answer: Option D
Explanation
54 (_{eight}) and 67(_{eight}) = 1438
Starting with normal addition, 4 + 7 gives 11
(it is more than the base, 8) 8 goes in 11 just 1 time, remaining 3, the remainder will be written, and the 1 will be added to the sum of 5 and 6 which gives 12 altogether, 8 goes in 12 one time remaining 4, the remainder 4 was written and then the 1 that was the quotient was then written since nothing to add the 1 to.
So answer is 143 in base eight
There is an explanation video available below.