Waec Mathematics 1998 Past Questions and Answers

Question 56:

• WAEC 1998

P varies inversely as Q. The table above shows the value of Q for some selected values of P
What is the missing value of Q in the table?

A. 4
B. 9
C. 15
D. 16
E. 144

Question 57:

• WAEC 1998

Three of the angles of a hexagon are each X^o. The others are each 3X^o. Find X

A. 30^o
B. 40^o
C. 60^o
D. 80^o
E. 120^o

Question 58:

• WAEC 1998

Evaluate \(\sqrt{20}\times (\sqrt{5})^3\)

A. 10
B. 20
C. 25
D. 50

Question 59:

• WAEC 1998

If P = {3, 7, 11, 13} and Q = {2, 4, 8, 16}, which of the following is correct

A. \((P\cap Q)^l={2, 3, 4, 13}\)
B. \(n(P\cup Q)=4\)
C. \(P\cup Q = \emptyset\)
D. \(P\cap Q = \emptyset\)

Question 60:

• WAEC 1998

It is observed that \(1 + 3 = 2^2, 1 + 3 + 5 = 3^2, 1 + 3 + 5 + 7 = 4^2. \\If \hspace{1mm}1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 = P^2 find\hspace{1mm}P\)

A. 6
B. 7
C. 8
D. 9