Waec Mathematics 2018 Past Questions and Answers

Question 46:

• WAEC 2018

A piece of thread of length 21.4cm is used to form a sector of a circle of radius 4.2cm on a piece of cloth. Calculate, correct to the nearest degree, the angle of the sector. [Take \(\pi = \frac{22}{7}\)]

A. 170\(^o\)
B. 192\(^o\)
C. 177\(^o\)
D. 182\(^o\)

Question 47:

• WAEC 2018

If tan x = \(\frac{4}{3}\), 0\(^o\) < x < 90\(^o\), find the value of sin x - cos x

A. \(\frac{1}{10}\)
B. \(\frac{1}{5}\)
C. \(\frac{5}{12}\)
D. 1\(\frac{2}{5}\)

Question 48:

• WAEC 2018

Given that Y is 20cm on a bearing of 300\(^o\) from x, how far south of y is x?

A. 10cm
B. 15cm
C. 25cm
D. 30cm

Question 49:

• WAEC 2018

The diagonals of a rhombus WXYZ intersect at M. If |MW| = 5cm and |MX| = 12cm, calculate its perimeter

A. 42cm
B. 48cm
C. 52cm
D. 60cm

Question 50:

• WAEC 2018

M and N are two subsets of the universal set (U). If n(U) = 48, n(M) = 20, n(N) = 30 and n(MUN) = 40, find n(M \(\cap\) N)

A. 18
B. 20
C. 30
D. 38