The units digit of (35)^(87) + (93)^(53) is: Choose the correct option:
A) 2	B) 4	C) 6	D) 8	E) 0

Rationale: the units digit of powers of 3 , cycles in a group of 4 : { 3 , 9 , 7 , 1 } 53 has the form 4 k + 1 , so the units digit of 93 ^ 53 is 3 . the units digit of powers of 5 is always 5 . 3 + 5 = 8 , so the units digit is 8 . the answer is d .
Answer: D