What is the tens digit of 36^10?  Choose the correct choice from the following answers
A) 1  B) 3  C) 5  D) 7  E) 9
36^10 = 6^20   If you type powers of six they end in   6   36   16   96   76   56   the pattern is 3--&gt;1--&gt;9--&gt;7--&gt;5 so for 36 we start with 3--&gt;9--&gt;5--&gt;1--&gt;7 and repeat.   36^10 will come at 7.   Answer 7.
<result>D</result>
What is the tens digit of 36^10?