Find the ones digit of 73^330
Choose the correct option.
A) 3  B) 5  C) 6  D) 7  E) 9
Cyclicity of 3 is 3,9,7,1after 4 multiplication again the cycle repeats.   So divide 330 by 4 and we get 87 as quotient and 2 as remainder. So cycle will run for 87 times and then 2 times more. So pick up the 2nd item from the cycle.   Hence Answer 5.
<result>B</result>
Find the ones digit of 73^330