Answer 1

4ⁿ = (2 × 2)ⁿ = 2ⁿ × 2ⁿ

2 is a factor of 4ⁿ.

So, 4ⁿ is always even and ends with 4 and 6.

When n is an even number say 2, 4, 6, 8 then 4ⁿ can end with the digit 6.

Example:

4² = 16

4³ = 64

4⁴ = 256

4⁵ = 1,024

4⁶ = 4,096

4⁷ = 16,384

4⁸ = 65,536

4⁹ = 262,144