Waec Mathematics 2018 Past Questions and Answers

Question 1:

• WAEC 2018

Simplify: \(\sqrt{108} + \sqrt{125} - \sqrt{75}\)

A. \(\sqrt{3} + 5\sqrt{5}\)
B. \(6 \sqrt{3} - 5 \sqrt{5}\)
C. \(6 \sqrt{3} + \sqrt{2}\)
D. \(6\sqrt{3} - \sqrt{2}\)

Question 2:

• WAEC 2018

Simplify: \(\sqrt{108} + \sqrt{125} - \sqrt{75}\)

A. \(\sqrt{3} + 5\sqrt{5}\)
B. \(6 \sqrt{3} - 5 \sqrt{5}\)
C. \(6 \sqrt{3} + \sqrt{2}\)
D. \(6\sqrt{3} - \sqrt{2}\)

Question 3:

• WAEC 2018

Evaluate: \((64^{\frac{1}{2}} + 125^{\frac{1}{3}})^2\)

A. 121
B. 144
C. 169
D. 196

Question 4:

• WAEC 2018

Given that y varies inversely as the square of x. If x = 3 when y = 100, find the equation connecting x and y.

A. \(yx^2 = 300\)
B. \(yx^2 = 900\)
C. Y = \(\frac{100x}{9}\)
D. \(y = 900x^2\)

Question 5:

• WAEC 2018

Find the value of x for which \(32_{four} = 22_x\)


A. Three
B. Five
C. Six
D. Seven