The average of three consecutive odd numbers is 43. What is the average of the smallest and largest?

Let five odd consecutive natural numbers be P, Q, R, S and T. What is their average?

The average of square of first 6 consecutive even numbers is:

Find the average of first 20 consecutive natural numbers.

If the average of m numbers is n*n and that of n numbers is m*m , then the average of m+n numbers is

The sum of nine consecutive natural numbers is 2088. The average of prime numbers among these numbers is