If k is a non-negative integer and 18^k is a divisor of 624,938 then 6^k - k^6 = Options.
A) 0  B) 1  C) 36  D) 118  E) 420

Rationale: "6 + 2 + 4 + 9 + 3 + 8 = 32 , so this number is not divisible by 3 and thus not divisible by 18 . therefore , k = 0 6 ^ k - k ^ 6 = 1 - 0 = 1 the answer is b ."
Answer: B