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Byju's Answer
Standard VIII
Mathematics
Addition and Subtraction of Algebraic Expression
If n is a nat...
Question
If n is a natural number, then unit digit in
6
n
−
5
n
A
1
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B
6
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C
5
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D
9
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Q.
If n is any natural number, then 6
n
− 5
n
always ends with
(a) 1
(b) 3
(c) 5
(d) 7
[Hint: For any n ∈ N, 6
n
and 5
n
end with 6 and 5 respectively. Therefore, 6
n
− 5
n
always ends with 6 − 5 = 1.]
