Mathematics 2018 Waec Past Questions and Answers

Question 26 :

• WAEC 2018

Find the \(n^{th}\) term of the sequence 2 x 3, 4 x 6, 8 x 9, 16 x 12...

A. 2\(^n\) x 3(n + 1)
B. 2\(^n\) x 3n
C. 2\(^n\) x 3\(^n\)
D. 2\(^n\) x 3\(^n - 1\)

Question 27 :

• WAEC 2018

If 3x\(^o\) 4(mod 5), find the least value of x

A. 1
B. 2
C. 3
D. 4

Question 28 :

• WAEC 2018

Find the inter-quartile range of 1, 3, 4, 5, 8, 9, 10, 11, 12, 14, 16

A. 6
B. 7
C. 8
D. 9

Question 29 :

• WAEC 2018

If x : y = \(\frac{1}{4} : \frac{3}{8}\) and y : z = \(\frac{1}{3} : \frac{4}{9}\), find x : z

A. 2:3
B. 3:4
C. 3:8
D. 1:2

Question 30 :

• WAEC 2018

Expression 0.612 in the form \(\frac{x}{y}\), where x and y are integers and y \(\neq\) 0

A. \(\frac{153}{250}\)
B. \(\frac{68}{111}\)
C. \(\frac{61}{100}\)
D. \(\frac{21}{33}\)