What is the remainder when (71)(73) is divided by 8?
Select:  A) 1  B) 2  C) 4  D) 5  E) 7

Rationale: "( 71 ) ( 73 ) = ( 72 - 1 ) ( 72 + 1 ) = 72 ^ 2 - 1 which is 1 less than a multiple of 8 . then the remainder will be 7 . the answer is e ."
Answer: E