Mathematics Past Questions and Answers

Twice a number, x, is added to 5, the result is at least 11. What is the range of values of x?

A X > 3
B X ≥ 3
C X ≤ 3
D X < 3
E X ≤ -3

Question 37:

Simplify [1 ÷ (x + 1)] - [2 ÷ (x - 1)] + [3 ÷ (x² - 1)]

A - 3x ÷ (x² - 1)
B - x ÷ (x² -1)
C X ÷ (x² - 1)
D (x + 1) ÷ (x² - 1)
E (x + 4) ÷ (x² - 1)

Question 38:

The mean heights of 3 groups of students consisting of 20, 16 and 14 students are 1.67m, 1.50m and 1.40m Respectively. What is the mean height of all the students?

A 1.52m
B 1.53m
C 1.54
D 1.55m
E 1.56m

Question 39:

The mean and the range of the set of numbers: 1.20, 1.00, 0.90, 1.40, 0.80, 0.80, 1.20 and 1.10 are p and respectively. What is the value of p ÷ q

A 1.11
B 65
C 1.85
D 2.45
E 3.85

Question 40:

A girl on top of a storey building 36m high dropped a N10.00 note on the ground below. If the angle of depression of the N10.00 note is 35°, how far is the money from the girl?

A 20.64m
B 29.48m
C 44.49m
D 49.55m
E 62.76m