If k is a non-negative integer and 15^k is a divisor of 823,435 then 5^k - k^5 =
Pick one:	A) 0	B) 1	C) 35	D) 120	E) 245

Rationale: "8 + 2 + 3 + 4 + 3 + 5 = 25 , so this number is not divisible by 3 and thus not divisible by 15 . therefore , k = 0 5 ^ k - k ^ 5 = 1 - 0 = 1 the answer is b ."
Answer: B