Mathematics Waec Past Questions and Answers

Question 21 :

• WAEC 1988

A sales girl gave a change of N1.15 to a customer instead of N1.25. Calculate her percentage error

A. 10%
B. 7%
C. 8.0%
D. 2.4%
E. 10%

Question 22 :

• WAEC 1988

What is the probability of having an odd number in a single toss of a fair die?

A. 1/6
B. 1/3
C. 1/2
D. 2/3
E. 5/6

Question 23 :

• WAEC 1988

A water tank is made with a right-angled trapezium - shaped vertical cross-section so that when it is placed on sloping ground the top of the tank is level. The dimension are given in the diagram above
If the tank is completely filled with water, how many cubic metres can it hold?

A. 66m³
B. 84m³
C. 132m³
D. 168m³
E. 264m³

Question 24 :

• WAEC 1988

A water tank is made with a right-angled trapezium - shaped vertical cross-section so that when it is placed on sloping ground the top of the tank is level. The dimension are given in the diagram above
By what number will you multiply your answer in 22 above to determine the capacity of the tank in liters?

A. 1/10
B. 1
C. 10
D. 100
E. 1000

Question 25 :

• WAEC 1988

Evaluate log₁₀6 + log₁₀45 - log₁₀27 without using logarithm tables

A. O
B. 1
C. 1.1738
D. 1.3802
E. 10