Jamb Mathematics 1995 Past Questions and Answers

Question 21:

• JAMB 1995

If a \(\ast\) b = + \(\sqrt{ab}\), evaluate 2 \(\ast\)(12 \(\ast\) 27)

A. 12
B. 9
C. 6
D. 2

Question 22:

• JAMB 1995

Find the sum to infinity of the following sequence \(1, \frac{9}{10}, (\frac{9}{10})^{2}, (\frac{9}{10})^{3}\)

A. \(\frac{1}{10}\)
B. \(\frac{9}{10}\)
C. \(\frac{10}{9}\)
D. 10

Question 23:

• JAMB 1995

\(\begin{vmatrix} -2 & 1 & 1 \\ 2 & 1 & k \\1 & 3 & -1 \end{vmatrix}\) = 23

A. 1
B. 2
C. 3
D. 4

Question 24:

• JAMB 1995

If x = \(\begin{pmatrix} 1 & 2 \\ 0 & 3 \end{pmatrix}\) and y = \(\begin{pmatrix} 2 & 1 \\ 4 & 3 \end{pmatrix}\). Find xy.

A. \(\begin{pmatrix} 10 & 7 \\ 12 & 9 \end{pmatrix}\)
B. \(\begin{pmatrix} 2 & 7 \\ 4 & 17 \end{pmatrix}\)
C. \(\begin{pmatrix} 10 & 4 \\ 4 & 6 \end{pmatrix}\)
D. \(\begin{pmatrix} 4 & 3 \\ 10 & 9 \end{pmatrix}\)

Question 25:

• JAMB 1995

In a triangle XYZ, < YXZ = 44° and < XYZ = 112°. Calculate the acute angle between the internal bisectors of < XYZ and < XZY.

A. 12^o
B. 56^o
C. 68^o
D. 78^o