Waec Mathematics 2005 Past Questions and Answers

Question 21:

• WAEC 2005

What is the diameter of a circle of area 77cm² [Take \(\pi = \frac{22}{7}\)]

A. \(\frac{\sqrt{2}}{7}cm\)
B. \(3\frac{1}{2}cm\)
C. 7cm
D. \(7\sqrt{2}cm\)

Question 22:

• WAEC 2005

Solve the equation 2x - 3y = 22; 3x + 2y = 7

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

Question 23:

• WAEC 2005

Solve the equation \(\frac{2y-1}{3} - \frac{3y-1}{4} = 1\)

A. -8
B. -13
C. 13
D. 19

Question 24:

• WAEC 2005

If \(log_9x= 1.5\),find x

A. 36
B. 27
C. 24.5
D. 13.5

Question 25:

• WAEC 2005

A sequence is given by \(2\frac{1}{2}, 5, 7\frac{1}{2}, .....\) if the nth term is 25, find n

A. 9
B. 10
C. 12
D. 15