hard · GMAT Quant
The units digit of 7^n cycles through 7, 9, 3, 1 and the units digit of 3^n cycles through 3, 9, 7, 1, each with period 4.
What is the units digit of 7^82 + 3^43?
- 6
- 8
- 0
- 2
- 4
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