What is the unit’s digit of 7^6	Choose one.
A) 1	B) 3	C) 5	D) 7	E) 9

Rationale: "7 ^ 1 = 7 7 ^ 2 = 49 7 ^ 3 = 343 7 ^ 4 = 1 ( last digit ) 7 ^ 5 = 7 ( last digit ) and the cycle repeats after every 4 powers therefore , last digit of 7 ^ 6 = 9 answer e"
Answer: E