Waec Mathematics 1991 Past Questions and Answers

Question 21:

• WAEC 1991

The shaded portion shows the outer boundary
of the half plane defined by the inequality

A. 4x + 3y \(\geq\) 6
B. 4x + 3y = 6
C. 4x + 3y < 6
D. 3y >6
E. 4x < 6

Question 22:

• WAEC 1991

Find the coordinates of point B

A. (0,1¹/₂)
B. (O,2)
C. (2,0)
D. (1¹/₂, 2)
E. (1¹/₂, 0)

Question 23:

• WAEC 1991

The first term a of an A.P is equal to twice the
common difference d. Find, in terms of d, the 5th
term of the A.P.

A. 4d
B. 5d
C. 6d
D. A + 5d
E. 2a + 4d

Question 24:

• WAEC 1991

The common ratio of a G.P. is 2. If the 5th term is
greater than the 1st term by 45, find the 5th term,

A. 3
B. 6
C. 45
D. 48
E. 90

Question 25:

• WAEC 1991

Two towns, P and Q, are on (4^oN 40^oW) and (4^oN
20^oE) respectively. What is the distance between
them, along their line of latitude? (Give your
answer in teems of π and R, the radius of the earth).

A. 2πR cos4^o
B. πR sin40^o
C. πR/2 cos4^o
D. πR/3 cos4^o
E. πR/6 cos4^o