Waec Mathematics Past Questions and Answers

Question 61:

• WAEC 1989

Evaluate \(\frac{0.009}{0.012}\), leaving your answer in standard form.

A. 7.5 x 10²
B. 7.5 x 10¹
C. 7.5 x 10^-1
D. 7.5 x 10^-2
E. 7.5 x 10^-3

Question 62:

• WAEC 1989

The graph above is that of a quadratic function y = 2x² - x - 6
The roots of the equation are

A. 1.5, 2
B. -1.5, 2
C. 1, -6
D. 1, 6
E. -1, 6

Question 63:

• WAEC 1989

Factorize the following expression; 2x² + x - 15

A. (2x+5)(x-3)
B. (2x-5)(x+3)
C. (2x-5)(x-3)
D. (2x-3)(x+5)
E. (2x+5)(x+3)

Question 64:

• WAEC 1989

The angle of elevation of X from Y is 30^o. If XY = 40m, how high is X above the level of Y?

A. 10m
B. 20m
C. 20√3m
D. 40m
E. 50m

Question 65:

• WAEC 1989

Instead of recording the number 1.23cm of the radius of a tube, a student recorded 1.32cm. Find the percentage of error, correct to one decimal place.

A. 6.8%
B. 7.3%
C. 9.6%
D. 14.4%
E. 15.4%