Jamb Mathematics 1983 Past Questions and Answers

Question 11:

• JAMB 1983

Make T the subject of the equation \(\frac{av}{1 - v}\) = \(\sqrt{\frac{2v + T}{a + 2T}}\)

A. T = \(\frac{3av}{1 - v}\)
B. T = \(\frac{1 + v}{2a^2v^3}\)
C. T = \(\frac{2v(1 - v)^3 - a^4v^3}{2a^3v^3 + (1 - v)^2}\)
D. \(\frac{2v(1 - v)^3 - a^4 v^3}{2a^3v^ 3 - (1 - v)^3}\)

Question 12:

• JAMB 1983

The value of (0.03)3 - (0.02)3 is

A. 0.019
B. 0.0019
C. 0.00019
D. 0.000019
E. 0.000035

Question 13:

• JAMB 1983

y varies partly as the square of x and partly as the inverse of the square root of x.Write down the expression for y if y = 2 when x = 1 and y = 6 when x = 4

A. Y = \(\frac{10x^2}{31} + \frac{52}{31\sqrt{x}}\)
B. Y = x² + \(\frac{1}{\sqrt{x}}\)
C. Y = x² + \(\frac{1}{x}\)
D. Y = \(\frac{x^2}{31} + \frac{1}{31\sqrt{x}}\)

Question 14:

• JAMB 1983

Simplify \(\frac{x - 7}{x^2 - 9}\) x \(\frac{x^2 - 3x}{x^2 - 49}\)

A. \(\frac{x}{(x - 3)(x - 7)}\)
B. \(\frac{x}{(x + 3)(x - 7)}\)
C. \(\frac{x}{(x + 3)(x + 7)}\)
D. \(\frac{x}{(x - 3)(x + 7)}\)

Question 15:

• JAMB 1983

The lengths of the sides of a right angled triangle are (3x + 1)cm, (3x - 1)cm and xcm. Find x

A. 2
B. 6
C. 18
D. 12
E. 5