Question

Five whole numbers are written in order

Answer 1

The mean is (x + y + 20)/5, so x + y has to be a multiple of 5, with 6 < x, y < 10. If we let x = 7 and y = 8, the sum of the five numbers is 35, so the mean is 7, which is the same as the median. So x = 7 and

y = 8.