Waec Mathematics 1989 Past Questions and Answers

Question 31:

• WAEC 1989

Simplify \(\frac{9^{-\frac{1}{2}}}{27^{\frac{2}{3}}}\)

A. 1
B. 1/3
C. 1/9
D. 1/18
E. 1/27

Question 32:

• WAEC 1989

In the diagram above, what is the size of angle ACB?

A. 40^o
B. 50^o
C. 60^o
D. 80^o
E. 100^o

Question 33:

• WAEC 1989

With reference to the graph above, which f the following solution sets is represented by ΔOPQ?

A. Y ≥ x, y ≤ 0, y + x ≥ 7
B. Y ≤ x, y ≥ 0, y + x ≤ 7
C. Y ≥ x, y ≥ 0, y + x ≤ 7
D. Y ≤ x, y ≤ 0, y + x ≤ 7
E. Y ≤ x, y ≥ 0, y + x ≥ 7

Question 34:

• WAEC 1989

Find the volume of a cone of radius 3.5cm and vertical height 12cm [Take π = 22/7]

A. 3.4cm²
B. 15.5cm²
C. 21.0cm²
D. 42.0cm²
E. 154.0cm²

Question 35:

• WAEC 1989

The table above gives the scores of a group of students in an English Language test

If a student is chosen at random from the group, what is the probability that the scored at least 6 marks?

A. 3/20
B. 1/5
C. 1/4
D. 3/10
E. 3/4