Waec Mathematics 1998 Past Questions and Answers

Question 31:

• WAEC 1998

The values of x when y = -1 are approximately

A. -10 and 2.0
B. -1.3 and 2.3
C. -0.6 and 2.6
D. -0.6 and 1.6
E. 1.6 and 1.6

Question 32:

• WAEC 1998

A box contain 2 white and 3 blue identical balls. If two balls are picked at random, one after the other, without replacement, what is the probability of picking two balls of different colours?

A. \(\frac{5}{25}\)
B. \(\frac{7}{20}\)
C. \(\frac{3}{5}\)
D. \(\frac{2}{3}\)
E. \(\frac{5}{6}\)

Question 33:

• WAEC 1998

In ∆PQR. ∠PQR is a right angle. |QR| = 2cm and ∠PRQ = 60^o. Find |PR|

A. 4√3cm
B. 4cm
C. 2√3cm
D. \(\frac{4}{3}cm\)
E. 1cm

Question 34:

• WAEC 1998

In the diagram, PQ||SR. Find the value of Z

A. 30^o
B. 40^o
C. 45^o
D. 90^o
E. 120^o

Question 35:

• WAEC 1998

In \(sin(X+30)^o=cos40^o\),find X

A. 10^o
B. 20^o
C. 50^o
D. 60^o
E. 90^o