SOLUTION: What is the unit digit of 7^11^22^23 ? The options are= (A) 1 (B)3 (C)7 (D)9 .

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Question 621405: What is the unit digit of 7^11^22^23 ?
The options are=
(A) 1 (B)3 (C)7 (D)9 .
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
What is the unit digit of 7^11^22^23 ?
The options are=
(A) 1 (B)3 (C)7 (D)9
------------
22^23 = xxx.xxx48
11^(...xxx8) = ...E1 (E is even #)
--> (C) 7