Question 252377
0.5 to any power (or 5) produces the same 4 digits on the right once it becomes greater than the 4th power.
Exp...last 4
0......1
1......0005
2......0025
3......0125
4......0625 now it repeats
5......3125
6......5625
7......8125
8......0625
9......3125
etc.
The last 4 of the 100th power is the same as the 4th, 8th, 12th, etc, = 0625