Waec Mathematics 2015 Past Questions and Answers

Question 11:

• WAEC 2015

If m = 4, n = 9 and r = 16., evaluate \(\frac{m}{n}\) - 1\(\frac{7}{9}\) + \(\frac{n}{r}\)

A. 1\(\frac{5}{16}\)
B. 1\(\frac{1}{16}\)
C. \(\frac{5}{16}\)
D. - 1\(\frac{37}{48}\)

Question 12:

• WAEC 2015

Adding 42 to a given positive number gives the same result as squaring the number. Find the number

A. 14
B. 13
C. 7
D. 6

Question 13:

• WAEC 2015

Ada draws the graph of y = x² - x - 2 and y = 2x - 1 on the same axes. Which of these equations is she solving?

A. X² - x - 3 = 0
B. X² - 3x - 1 = 0
C. X² - 3x - 3 = 0
D. X² + 3x - 1 = 0

Question 14:

• WAEC 2015

The volume of a cone of height 3cm is 38\(\frac{1}{2}\)cm³. Find the radius of its base. [Take \(\pi = \frac{22}{7}\)]

A. 3.0cm
B. 3.5cm
C. 4.0cm
D. 4.5cm

Question 15:

• WAEC 2015

The dimension of a rectangular tank are 2m by 7m by 11m. If its volume is equal to that of a cylindrical tank of height 4cm, calculate the base radius of the cylindrical tank. [Take \(\pi = \frac{22}{7}\)]

A. 14cm
B. 7m
C. 3\(\frac{1}{2}\)m
D. 1\(\frac{3}{4}\)m