Waec Further Mathematics 2020 Past Questions and Answers

Question 21:

• WAEC 2020

A three-digit odd number less than 500 is to be formed from 1,2,3,4 and 5. If repetition of digits is allowed, in how many ways can this be done?

A. 125
B. 75
C. 60
D. 36

Question 22:

• WAEC 2020

The variables x and y are such that y =2x\(^3\) - 2x\(^2\) - 5x + 5. Calculate the corresponding change in y and x changes from 2.00 to 2.05.

A. 0.58
B. 0.95
C. 1.48
D. 1.95

Question 23:

• WAEC 2020

A bag contains 5 red and 5 blue identical balls. Three balls are selected at random without replacement. Determine the probability of selecting balls alternating in color.

A. \(\frac{7}{18}\)
B. \(\frac{5}{18}\)
C. \(\frac{5}{36}\)
D. \(\frac{1}{36}\)

Question 24:

• WAEC 2020

The distance(s) in metres covered by a particle in motion at any time, t seconds, is given by S =120t - 16t\(^2\). Find in metres, the distance covered by the body before coming to rest.

A. 220
B. 222
C. 223
D. 225

Question 25:

• WAEC 2020

P(3,4) and Q(-3, -4) are two points in a plane. Find the gradient of the line that is normal to the line PQ.

A. \(\frac{4}{3}\)
B. \(\frac{3}{4}\)
C. \(\frac{-3}{4}\)
D. \(\frac{-4}{3}\)