Waec Mathematics Past Questions and Answers

Question 1141:

• WAEC 2007

Find the smallest value of k such that 2\(^2\) x 3\(^3\) x 5 x k is a perfect square.

A. 3
B. 5
C. 15
D. 30

Question 1142:

• WAEC 2007

Expand the expression(3a - xy)(3a + xy)

A. 9a² - x²y²
B. 9a² + x²y²
C. 9a² - xy
D. 9a² + x²y

Question 1143:

• WAEC 2007

Simplify \(\frac{4}{2x} - \frac{2x + x}{x}\)

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

Question 1144:

• WAEC 2007

Two circles have radii 16cm and 23cm. What is the difference between their circumference? take \(\pi = \frac{22}{7}\)

A. 422.92cm
B. 149.92cm
C. 44.00cm
D. 43.96cm

Question 1145:

• WAEC 2007

The volume of a cylinder is 1200cm³ and the area of its base is 1500cm². Find the height of the cylinder.

A. 80.00cm
B. 8.00cm
C. 0.80cm
D. 0.08cm