Try this one:
What is the units digit of 13^35?
A) 1
B) 3
C) 5
D) 7
E) 9
Let’s begin by looking for a pattern as we increase the exponent.
13^1 = 13 (units digit is 3)
13^2 = 169 (units digit is 9)
13^3 = 2197 (units digit is 7)
Aside:...

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