(Q3).Consider the numbers of the form 4ⁿ where n is a natural number. Check whether there is any value of n for which 4ⁿ ends with zero?

If 4ⁿ is to end with zero for a natural number n, it should be divisible by 2 and 5

Prime factors of 4ⁿ should contain 2 and 5

4ⁿ = 2²ⁿ

Here only 2 is factor.

Hence no natural number n for which 4ⁿ ends with the digit .