Jamb Mathematics Past Questions and Answers

Question 721:

• JAMB 1983

Given a regular hexagon, calculate each interior angle of the hexagon

A. 60^o
B. 30^o
C. 120^o
D. 45^o
E. 135^o

Question 722:

• JAMB 1983

If x is jointly proportional to the cube of y and the fourth power of z. In what ratio is x increased or decreased when y is halved and z is doubled?

A. 4:1 increase
B. 2:1 increase
C. 1:1 no change
D. 1:4 decrease
E. 3:4 decrease

Question 723:

• JAMB 1983

Solve the following equations 4x - 3 = 3x + y = x - y = 3, 3x + y = 2y + 5x - 12

A. X = 5, y = 2
B. X = 2, y = 5
C. X = 5, y = -2
D. X = -2, y = -5
E. X = -5, y = -2

Question 724:

• JAMB 1983

In a figure, PQR = 60^o, PRS = 90^o, RPS = 45^o, QR = 8cm. Determine PS

A. 2\(\sqrt{3}\)cm
B. 4\(\sqrt{6}\)cm
C. 2\(\sqrt{6}\)cm
D. 8\(\sqrt{6}\)cm
E. 8cm

Question 725:

• JAMB 1983

Given that cos z = L , whrere z is an acute angle, find an expression for \(\frac{\cot z - \csc z}{\sec z + \tan z}\)

A. \(\frac{1 - L}{1 + L}\)
B. \(\frac{L^2 \sqrt{3}}{1 + L}\)
C. \(\frac{1 + L^3}{L^2}\)
D. \(\frac{L(L - 1)}{1 - L + 1 \sqrt{1 - L^2}}\)