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

If x is the average of 1², 2², 3², ..., 10² and y is the average of first 10 even natural numbers, then y is what percent of x − y?

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

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

If M is the mean of the first 100 even natural numbers, then what is the mean of the first 100 odd natural numbers?

The average of four numbers 70, x6, 5x and 11x is 71. If x represents the same digit, then x² + 1 is equal to