Mathematics Past Questions and Answers

How many terms of the series 3, -6, +12, - 24, + ..... are needed to make a total of 1-2⁸?

A 12
B 10
C 9
D 8

Question 47:

Find p, q for which \(\begin{pmatrix} 2p & 8 \\ 3 & -5q \end{pmatrix}\)\(\begin{pmatrix} 1 \\ 2\end{pmatrix}\)\(\begin{pmatrix}24 \\ -17\end{pmatrix}\)

A -4
B 45
C 4,2
D 2

Question 48:

If x = \(\begin{pmatrix} 1 & 0 & 1 \\ 2 & -1 & 0 \\ -1 & 0 & 1\end{pmatrix}\) and y = \(\begin{pmatrix} -1 & 1 & 2 \\ 0 & -1 & -1 \\ 2 & 0 & 1\end{pmatrix}\)
find 2x - y

A \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & -3 & -1 \\ -4 & 1 & 1\end{pmatrix}\)
B \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & -1 & 1 \\ -4 & 1 & 1\end{pmatrix}\)
C \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & -3 & 1 \\ -4 & 1 & 1\end{pmatrix}\)
D \(\begin{pmatrix} 3 & -1 & 0 \\ 4 & 1 & 1 \\ -4 & -1 & 1\end{pmatrix}\)

Question 49:

Find the roots of x\(^3\) - 2x\(^2\) - 5x + 6 = 0

A 1, -2, 3
B 1, 2, -3,
C -1, -2, 3
D -1, 2, -3

Question 50:

The response of 160 pupils in a school asked to indicate their favourite subjects is given in the bar chart above. What percentage of the pupils have English and Health education as the their favourite subjects?

A 55%
B 52%
C 36%
D 22%