What is (21^7+21) / 21? Choose the correct choice from the following:
A) 82216043 B) 83786095 C) 84316108 D) 85766122 E) 86426237

Rationale: ( 21 ^ 7 + 21 ) / 21 = 21 * ( 21 ^ 6 + 1 ) / 21 = 21 ^ 6 + 1 clearly this is a number which ends with a 2 in the units place . the answer is d .
Answer: D