Jamb Mathematics 1982 Past Questions and Answers

Question 36:

• JAMB 1982

The square base of a pyramid of side 3cm has height 8cm. If the pyramid is cut into two parts by a plane parallel to the base midway between the base and the vertex, the volumes of the two sections are

A. (21cm³, 3cm³)
B. (24cm³, 3cm³)
C. (24cm³, 21cm³)
D. (72cm³, 9cm³)
E. (63cm³, 9cm³)

Question 37:

• JAMB 1982

Simplify f^{\(\frac{1}{2}\)}g²h^{\(\frac{1}{2}\)} \(\div\) f^{\(\frac{5}{2}\)}g^oh^{\(\frac{7}{3}\)}

A. (\(\frac{g}{fh}\))²
B. F²g²h²
C. \(\frac{5}{4}\)g^oh\(\frac{7}{9}\)
D. \(\frac{g^2}{f^5h^7}\)
E. \(\frac{1}{f^2h^2}\)

Question 38:

• JAMB 1982

Determine the mean monthly salary of 50 employees of a company from the following frequency distribution.
\(\begin{array}{c|c} \text{Monthly salary} & \text{Frequency}\\\hline N200.00 & 10\\ N325.00 & 5\\N100.00 & 20\\N120.00 & 2\\ N60.00 & 10\\ N80.00 & 3\end{array}\)

A. N215.30
B. N134.10
C. N143.10
D. N80.00
E. N50.30

Question 39:

• JAMB 1982

If the function y = 5x is graphed, what would be its intercept on the y-axis?

A. 5
B. \(\frac{1}{5}\)
C. 1
D. 2
E. Zero

Question 40:

• JAMB 1982

A side of a rhombus is 2cm in length. An angle of the rhombus is 60^o. What is the length of the diagonal facing this angle?

A. 2cm
B. 8cm
C. 4cm
D. 2\(\sqrt{3}\)cm
E. 16cm