If n = 5^11 – 5, what is the units digit of n?  Choose one:  A) 0  B) 1  C) 4  D) 6  E) 8
Always divide the power (incase 11) by 4 and use the remainder as the new power. The question now becomes 5^3 - 5. Now 5^3 has last digit 5. we subtract 5 from 5=0 is the answer. Option 0
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If n = 5^11 – 5, what is the units digit of n?