Jamb Mathematics Past Questions and Answers

Question 396:

• JAMB 2014

What is the common ratio of the G.P. \((\sqrt{10} + \sqrt{5}) + (\sqrt{10} + 2\sqrt{5}) + ... \)?

A. \(\sqrt{2}\)
B. \(\sqrt{5}\)
C. 3
D. 5

Question 397:

• JAMB 2014

A binary operation * is defined by x * y = x^y. If x * 2 = 12 - x, find the possible values of x

A. 3,4
B. 3,-4
C. -3,4
D. -3,-4

Question 398:

• JAMB 2014

Find y, if \(\begin{pmatrix}5 & -6 \\2 & -7\end{pmatrix}\begin{pmatrix}x \\ y \end{pmatrix} = \begin{pmatrix}7 \\-11\end{pmatrix}\)

A. 8
B. 5
C. 3
D. 2

Question 399:

• JAMB 2014

If \(\begin{vmatrix}-x & 12 \\-1 & 4 \end{vmatrix} = - 12\), find x.

A. -6
B. -2
C. 3
D. 6

Question 400:

• JAMB 2014

Find the value of \(\begin{vmatrix}0 & 3 & 2 \\1 & 7 & 8 \\0 & 5 & 4\end{vmatrix}\).

A. 12
B. 10
C. -1
D. -2