Mathematics 2015 Waec Past Questions and Answers

Question 46 :

• WAEC 2015

A letter is selected from the letters of the English alphabet. What is the probability that the letter selected is from the word MATHEMATICS?

A. \(\frac{9}{13}\)
B. \(\frac{11}{26}\)
C. \(\frac{4}{13}\)
D. \(\frac{1}{26}\)

Question 47 :

• WAEC 2015

In a circle radius rcm, a chord 16\(\sqrt{3}cm\) long is 10cmfrom the centre of the circle. Find, correct to the nearest cm, the value of r

A. 22cm
B. 17cm
C. 16cm
D. 15cm

Question 48 :

• WAEC 2015

In the diagram, \(\bar{OX}\) bisects < YXZ and \(\bar{OZ}\) bisects < YZX. If < XYZ = 68^o, calculate the value of < XOZ

A. 68^o
B. 72^o
C. 112^o
D. 124^o

Question 49 :

• WAEC 2015

(a) Without using Mathematical tables or calculators, simplify:
\(3\frac{4}{9} \div (5\frac{1}{3} - 2\frac{3}{4}) + 5\frac{9}{10}\)
(b) A number is selected at random from each of the sets {2, 3, 4} and {1, 3, 5}. Find the probability that the sum of the two numbers is greater than 3 and less than 7.

Question 50 :

• WAEC 2015

(a) Solve the inequality : \(4 + \frac{3}{4}(x + 2) \leq \frac{3}{8}x + 1\)
(b)
The diagram shows a rectangle PQRS from which a square of side x cm has been cut. If the area of the shaded portion is 484\(cm^{2}\), find the values of x.