Waec Mathematics 2009 Past Questions and Answers

Question 26:

• WAEC 2009

Each of the interior angles of a regular polygon is 140^o. Calculate the sum of all the interior angles of the polygon

A. 1080^o
B. 1260^o
C. 1800^o
D. 2160^o

Question 27:

• WAEC 2009

A bucket holds 10 litres of water. How many buckets of water will fill a reservoir of size 8m x 7m x 5m.(1 litre = 1000cm³)`

A. 28
B. 280
C. 2800
D. 28000

Question 28:

• WAEC 2009

A box contains black, white and red identical balls. The probability of picking a black ball at random from the box is \(\frac{3}{10}\) and the probability of picking a white ball at random is \(\frac{2}{5}\). If there are 30 balls in the box, how many of them are red?

A. 3
B. 7
C. 9
D. 12

Question 29:

• WAEC 2009

Simplify; \(\frac{1}{2}\sqrt{32} - \sqrt{18} \sqrt{2}\)

A. Zero
B. \(\sqrt{2}\)
C. 2\(\sqrt{2}\)
D. 4\(\sqrt{2}\0

Question 30:

• WAEC 2009

The angles of triangle are (x + 10)^o, (2x - 40)^o and (3x - 90)^o. Which of the following accurately describes the triangle?

A. It is a scalene triangle
B. It is right angled isosceles triangle
C. T is an equilateral triangle
D. It is an isosceles triangle but not right angled