Question

A, b, c and d are four consecutive odd numbers and their average is 42. what is the product of b and d?

Answer 1

Solution = X,X+1,X+2,X+3 = 42
=X+X+X+X+1+2+3 = 42
=4X+6 = 42
=4X = 42-6
=4X = 36
=X = 36÷4
=X = 9