Question

Which of the following numbers will not end with 0 for any natural number n?

Options

• 4n

• 4ⁿ

• 3ⁿ + 1

• 10^{n + 1}

Answer 1

4ⁿ

Explanation:

4n ⇒ 4 × 5 = 20, ends with 0.

4ⁿ ⇒ 4, 16, 64, ..., not end with 0.

3^{n + 1} ⇒ 3^{2 + 1} = 10, end with 0.

10^{n + 1} ⇒ 10^{1 + 1} = 100, end with 0.