Gary performed the following three operations: 15 ÷ x, 21 ÷ x and 6 ÷ x. If he never got a remainder and x is an integer greater than 1, what is the value of x?
Gary performed the following three operations: 15 ÷ x, 21 ÷ x and 6 ÷ x. If he never got a remainder and x is an integer greater than 1, what is the value of x?
Or
Hence
The prime factors of 6 are 1, 2 and 3.
15 and 21 are divisible by 3 but not by 2.