Mathematics 1992 Jamb Past Questions and Answers

Question 46 :

• JAMB 1992

The sketch is the curve of y = ax² + bx + c. Find a, b and c respectively

A. 1, 0, -4
B. -2, 2, -4
C. 0, 1, -4
D. 2, -2, -4
E. 2, -2, -4

Question 47 :

• JAMB 1992

In the figure, TSP = 100° and PRQ = 20°. Find PQR.

A. 140^o
B. 120^o
C. 75^o
D. 30^o

Question 48 :

• JAMB 1992

In the figure, PQR is a semicircle while PQ and QR are chords. QS is the perpendicular from Q to the diameter PR. What is the expression for QS?

A. QS = PS\(\sqrt{SR}\)
B. QS = \(\sqrt{(PS SR)}\)
C. QS = 2\(\sqrt{(PS SR)}\)
D. QS = \(\frac{1}{\sqrt{2}}\)\(\sqrt{(PS SR)}\)

Question 49 :

• JAMB 1992

The diagram is a circle with centre O. Find the area of the shaded portion

A. 9(\(\pi - 2) cm^2\)
B. 18\(\pi cm^2\)
C. 9\(\pi cm^2\)
D. 36\(\pi cm^2\)