Waec Mathematics Past Questions and Answers

Question 521:

• WAEC 1997

What is the probability of having an odd number in a single throw of a fair die with the faces numbered 1,2,3,4,5,6?

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

Question 522:

• WAEC 1997

A bag contains 3 white, 6 red, 5 blue identical balls. A ball is picked at random from bag. What is the probability that is either white or blue?

A. 9/14
B. 4/7
C. 3/7
D. 5/14
E. 3/14

Question 523:

• WAEC 1997

(a) Copy and complete the binary multiplication table:

x	10	11	100	101
10	100		1000
11	110		1100
100			10000	10100

(b) Convert \(11.011_{two}\) to a number in base ten.
(c) Simplify \(\frac{9.6 \times 10^{18}}{0.24 \times 10^{5}}\) and express your answer in the form \(P \times 10^{m}\) where 1 < P < 10 and m is an integer.

Question 524:

• WAEC 1997

(a) The 6th term of an A.P is 35 and the 13th term is 77. Find the 20th term.
(b)
The Venn diagram represents three subsets P, Q and R of the universal set U. Copy the Venn diagram. Shade and indicate the regions represented by (i) \(P \cap Q' \cap R\) ; (ii) \(P' \cap Q \cap R'\).

Question 525:

• WAEC 1997

(a) Given that \(\sin x = \frac{5}{13}, 0° \leq x \leq 90°\), find \(\frac{\cos x - 2 \sin x }{2\tan x}\).
(b)
The diagram represents the vertical cross-section of a mountain with height NQ standing on a horizontal ground PRN. If the angles of elevation of the top of the mountain from P and R are 30° and 70° respectively and PR = 500m, calculate, correct to 3 significant figures :
(i) |QP| ; (ii) the height of the mountain.