Question 310098
Determine the ones digit when the expression is evaluated. 
Problem: 34^202 
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Look at the powers of 34, or any number whose 1's digit is 4.
Powers of 34:
34
1156
39304
1336336
45435424
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Notice that the 1's digit alternates between 4 and 6.
That's true for all numbers xxxxxx...4.
4
16
64
256
1024
4096
etc
If it's an even exponent, it's 6
If it's odd, it's 4.