Waec Mathematics Past Questions and Answers

Question 691:

• WAEC 2000

In the diagram, POS and ROT are straight lines, OPQR is a parallelogram. |OS| = |OT| and ∠OST = 50°. Calculate ∠OPQ.

A. 160^o
B. 140^o
C. 120^o
D. 100^o

Question 692:

• WAEC 2000

Given that \(x = -\frac{1}{2}and \hspace{1mm} y = 4 \hspace{1mm} evaluate \hspace{1mm} 3x^2y+xy^2\)

A. -5
B. -1
C. 4
D. 11

Question 693:

• WAEC 2000

Given that \(27^{(1+x)}=9,)\ find x

A. -3
B. \(\frac{-1}{3}\)
C. \(\frac{5}{3}\)
D. 2

Question 694:

• WAEC 2000

If x varies inversely as y and \(x = \frac{2}{3}\) when y = 9, find the value of y when \(x=\frac{3}{4}\)

A. \(\frac{1}{18}\)
B. \(\frac{8}{81}\)
C. \(\frac{9}{2}\)
D. 8

Question 695:

• WAEC 2000

Given that (2x + 7) is a factor of \(2x^2 + 3x - 14\), find the other factor

A. X + 2
B. 2 - x
C. X - 2
D. X + 1