Q645
Let x = (633)24 - (277)38 + (266)54. What is the units digits of x?
A.
8
AnswerB.
6
C.
4
D.
7
Answer: Option A
Solution
Answer: Option A
Solution:
x = (633)24 - (277)38 + (266)54x = 1 - 9 + 6
x = 7 - 9
x = . . . . . 7 - 9
x = 17 - 9
x = 8