exam Maths Puzzle Numerical Ability

In 2010 the population of the world is predicted to be 6.8 billion, by 2050 the population is predicted to be 9.4 billion I need to write an inequality equation to show this trend.

Read Solution (Total 0)

exam Other Question

Solve the equation by the method of your choice.

(4x+6)squared = 25 Find two consecutive positive intergers such that the sum of their square is 85

This problem has confused me by adding in square, how do I go about solving this type of problem?