Waec Mathematics 2018 Past Questions and Answers

Question 11:

• WAEC 2018

If x : y : z = 3 : 3 : 4, evaluate \(\frac{9x + 3y}{6x - 2y}\)


A. 1\(\frac{1}{2}\)
B. 2
C. 2\(\frac{1}{2}\)
D. 3

Question 12:

• WAEC 2018

Simplify; \(\frac{2 - 18m^2}{1 + 3m}\)

A. \(2 (1 + 3m)\)
B. \(2 (1 + 3m^2)\)
C. \(2(1 - 3m)\)
D. \(2(1 - 3m^2)\)

Question 13:

• WAEC 2018

A curve is such that when y = 0, x = -2 or x = 3. Find the equation of the curve.

A. Y = \(x^2 - 5x - 6\)
B. Y = \(x^2 + 5x - 6\)
C. Y = \(x^2 + x - 6\)
D. Y = \(x^2 - x - 6\)

Question 14:

• WAEC 2018

The volume of a cylindrical tank, 10m high is 385 m\(^2\). Find the diameter of the tank. [Take \(\pi = \frac{22}{7}\)]

A. 14m
B. 10m
C. 7m
D. 5m

Question 15:

• WAEC 2018

The surface area of a sphere is \(\frac{792}{7} cm^2\). Find, correct to the nearest whole number, its volume. [Take \(\pi = \frac{22}{7}\)]

A. 113\(cm^3\)
B. 131\(cm^3\)
C. 311\(cm^3\)
D. 414\(cm^3\)