Waec Further Mathematics Past Questions and Answers

Question 121:

• WAEC 2015

The sum, \(S_{n}\), of a sequence is given by \(S_{n} = 2n^{2} - 5\). Find the 6th term.

A. 112
B. 67
C. 45
D. 22

Question 122:

• WAEC 2015

A 24N force acts on a body such that it changes its velocity from 5m/s to 9m/s in 2 secs.If the body is travelling in a straight line, calculate the distance covered in the period.

A. 22m
B. 18m
C. 14m
D. 10m

Question 123:

• WAEC 2015

Given that \(y = 4 - 9x\) and \(\Delta x = 0.1\), calculate \(\Delta y\).

A. 9.0
B. 0.9
C. -0.3
D. -0.9

Question 124:

• WAEC 2015

Four fair coins are tossed once. Calculate the probability of having equal heads and tails.

A. \(\frac{1}{4}\)
B. \(\frac{3}{8}\)
C. \(\frac{1}{2}\)
D. \(\frac{15}{16}\)

Question 125:

• WAEC 2015

In calculating the mean of 8 numbers, a boy mistakenly used 17 instead of 25 as one of the numbers. If he obtained 20 as the mean, find the correct mean.

A. 24
B. 23
C. 21
D. 19