Jamb Mathematics 1984 Past Questions and Answers

Question 36:

• JAMB 1984

Measurements of the diameters, in centimeters, in centimeters, of 20 copper spheres are distributed as shown below
\(\begin{array}{c|c} \text{Class boundary in cm} & \text{frequency} & \\\hline 3.35 - 3.45 & 3\\ 3.45 - 3.55 & 6\\ 3.55 - 3.65 & 7\\ 3.65 - 3.75 & 4\end{array}\)
What is the mean diameter of the copper spheres?

A. 3.40cm
B. 3.58cm
C. 3.56cm
D. 3.62cm

Question 37:

• JAMB 1984

What is the volume of this regular three dimensional figure?

A. 160cm²
B. 48cm²
C. 120cm²
D. 40cm²

Question 38:

• JAMB 1984

Using \(\bigtriangleup\)XYZ in the figure, find XYZ

A. 29^o
B. 31^o
C. 31^o 20'
D. 31^o 18'

Question 39:

• JAMB 1984

Find the area of the shaded portion of the semicircular figure.

A. \(\frac{r^2}{4}(4 \pi - 3 \sqrt{3})\)
B. \(\frac{r^2}{4}(2 \pi - 3 \sqrt{3})\)
C. \(\frac{1}{2}r^2 \pi\)
D. \(\frac{1}{8}r^2 \sqrt{3}\)
E. \(\frac{r^2}{4}(4 \pi - 3 \sqrt{3})\)

Question 40:

• JAMB 1984

In the figure, PQRSTW is a regular hexagon. QS intersects RT at V. Calculate TVS

A. 60^o
B. 90^o
C. 120^o
D. 30^o
E. 80^o