Q. 105.0( 2 Votes )
If n is a rational number, then units digit in 6n – 5n is:
A. 1
B. 6
C. 5
D. 9
Answer :
Any power of 6 will have 6 at its units place and any power of 5 will have 5 at its units place. So when we subtract the units digits that is 6 – 5 we get 1 as the answer.
So the correct answer is A.
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