The sum of two numbers is 15 and their geometric mean is 20% lower than their arithmetic mean. Then the numbers will be:

The arithmetic mean of the numbers 9, 12, 15, 18, 20, 22 is increased by 1, if 15 is replaced by

The arithmetic mean of the series 1, 2, 4, 8, 16, ... 2ⁿ is

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 average of four numbers is 12.5. If each number is increased by 2.5, then the new average will be:

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