Waec Mathematics 2000 Past Questions and Answers

Question 26:

• WAEC 2000

If the interior angles of hexagon are 107°, 2x°, 150°, 95°, (2x-15)° and 123°, find x.

A. \(57\frac{1}{2}^{\circ}\)
B. \(65^{\circ}\)
C. \(106^{\circ}\)
D. \(120^{\circ}\)

Question 27:

• 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 28:

• 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 29:

• WAEC 2000

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

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

Question 30:

• 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