Waec Further Mathematics 2020 Past Questions and Answers

Question 6:

• WAEC 2020

Calculate the probability that the product of two numbers selected at random with replacement from the set {-5,-2,4, 8} is positive

A. \(\frac{2}{3}\)
B. \(\frac{1}{2}\)
C. \(\frac{1}{3}\)
D. \(\frac{1}{6}\)

Question 7:

• WAEC 2020

Find the angle between i + 5j and 5i - J

A. 0\(^o\)
B. 45\(^o\)
C. 60\(^o\)
D. 90\(^o\)

Question 8:

• WAEC 2020

Given that F = 3i - 12j, R = 7i + 5j and N = pi + qj are forces acting on a body, if the body is in equilibrium. find the values of p and q.

A. P=-10, q=7
B. P=-10, q=-7
C. P=10, q=- 7
D. P-10, q=7

Question 9:

• WAEC 2020

A stone was dropped from the top of a building 40m high. Find, correct to one decimal place, the time it took the stone to reach the ground. [Take g = 9.8ms\(^{-2}\)]

A. 2.9.seconds
B. 2.8 seconds
C. 2.6 seconds
D. 1.4 seconds

Question 10:

• WAEC 2020

In which of the following series can be the formula S = \(\frac{a}{1 - r}\) where a is the first term and r is the common ratio, be used to find the sum of all the terms?

A. 4 + 8 + 16 + 32 + ...
B. \(\frac{1}{2}\) + 2 \(\frac{1}{2}\) + 12\(\frac{1}{2}\) + 62 \(\frac{1}{2}\) + ..
C. \(\frac{4}{81}\) + \(\frac{2}{27}\) + \(\frac{1}{9}\) + \(\frac{1}{6}\) + ...
D. 128 + 64 + 32 + 16 + ...