Waec Mathematics Past Questions and Answers

Question 636:

• WAEC 1999

Two numbers 24\(_{x}\) and 31\(_y\) are equal in value when converted to base ten. Find the equation connecting x and y

A. 2x = 3(y - 1)
B. 4x - y = 1
C. 3y + 2x = 3
D. 3y = 2 (x + 3)

Question 637:

• WAEC 1999

A car travel at x km per hour for 1 hour and at y km per hour for 2 hours. Find its average speed

A. \(\frac{2x + 2y}{3}kmh^{-1}\)
B. \(\frac{x + y}{3}kmh^{-1}\)
C. \(\frac{x + 2y}{3}kmh^{-1}\)
D. \(\frac{2x + y}{3}kmh^{-1}\)

Question 638:

• WAEC 1999

The height and base of a triangle are in ratio 1:3 respectively. If the area of the triangle is 216 cm\(^2\), find the length of the base.

A. 24cm
B. 36cm
C. 72cm
D. 144cm

Question 639:

• WAEC 1999

Water flows from a tap into cylindrical container at the rate 5πcm\(^3\) per second. If the radius of the container is 3cm, calculate the level of water in the container at the end of 9 seconds.

A. 2cm
B. 5cm
C. 8cm
D. 15cm

Question 640:

• WAEC 1999

Amina had m mangoes. She ate 3 and shared the remainder equally with her brother Uche. Each had at least 10. Which of the following inequalities represents the statements above.

A. \(\frac{m}{2}-3\le 10\)
B. \(\frac{m}{2}-3\ge 10\)
C. \(\frac{m-3}{2}\ge10\)
D. \(\frac{m-3}{2}\le10\)