The last digit of 650 is ……………A) 1 B) 6C) 2 D) 3

1.	The last digit of 650 is ……………A) 1 B) 6C) 2 D) 3
Answer» Correct option is (B) 6 \(\because\) Cyclicity of 6 is 1. Thus, last digit of any natural number powers of 6 is 6. Alternative :- Last digit of \(6^2\) is 6. \((\because\) Last digit of \((6^2=36))\) Last digit of \(6^3\) is 6. \((\because\) Last digit of \((6^3=216)\) is 6) Here, we see that 6 to the power any natural numbers ends with 6. Thus, we conclude that last digit of \(6^{50}\) is 6. Correct option is B) 6

Answer»

Correct option is (B) 6

\(\because\) Cyclicity of 6 is 1.

Thus, last digit of any natural number powers of 6 is 6.

Alternative :-

Last digit of \(6^2\) is 6. \((\because\) Last digit of \((6^2=36))\)

Last digit of \(6^3\) is 6. \((\because\) Last digit of \((6^3=216)\) is 6)

Here, we see that 6 to the power any natural numbers ends with 6.

Thus, we conclude that last digit of \(6^{50}\) is 6.

Correct option is B) 6

Discussion