4, 16, 30, 20, 10, 14 and 26 are represented on a pie chart. Find the sum of the angles of the bisectors representing all numbers equals to or greater than 16

The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number

Two numbers are removed at random from the numbers 1, 2, 3 and 4. What is the probability that the sum of the numbers removed is even?

Find the probability that a number selected at random from 41 to 56 is a multiple of 9

Musa borrows N10.00 at 2% per month simple interest and repays N8.00 after 4 months. How much does he still owe?