Mathematics Past Questions and Answers

If m = 3, p = -3, q = 7 and r = 5/2, evaluate m(p+q+r)

A 19.50
B 19.15
C 18.95
D 18.05

Question 12:

A polynomial in x whose zeros are -2, -1 and 3 is

A X³ - 7x + 6
B X³ + 7x - 6
C X³ + 7x + 6
D X³ - 7x - 6

Question 13:

The time taken to do a piece of work is inversely proportional to the number of men employed. If it takes 30 men to do a piece of work in 6 days, how many men are required to do the work in 4 days?

A 20
B 35
C 45
D 60

Question 14:

The weight W kg of a metal bar varies jointly as its length L meters and the square of its diameter d meters. If w = 140 when d = 4²/₃ and L = 54, find d in terms of W and L.

A \(\sqrt{\frac{42W}{5L}}\)
B \(\sqrt{\frac{6L}{42W}}\)
C \(\frac{42W}{5L}\)
D \(\frac{5L}{42W}\)

Question 15:

Find the range of values of x for which 7x - 3 > 25 + 3x

A X >7
B X
C X>-7
D X