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Question -

If n is any natural number, then 6n – 5n always ends with
(a) 1
(b) 3
(c) 5
(d) 7



Answer -

(a) nis any natural number and 6n – 5n
We know that 6n ends with 6 and 5n ends with 5
6n – 5n will end with 6 – 5 = 1

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