Mathematics Past Questions and Answers

Calculate the mean deviation of the set of numbers 7, 3, 14, 9, 7, and 8.

A 13/6
B 5/2
C 7/6
D 7/3

Question 42:

In the diagram above , XZ is the diameter of the circle XZW, with center O and radius 15/2 cm. If XY = 12 cm, find the area of the triangle XYZ

A 54 cm²
B 45 cm²
C 27 cm²
D 75 cm²

Question 43:

The venn diagram above shows the numbers of students offering music and history in a class of 80 students. If a student is picked at random from the class, what is the probability that he offers Music only?

A 0.38
B 0.13
C 0.50
D 0.25

Question 44:

In the diagram above, PST is a straight line, PQ = QS = RS. If ∠ RST = 72^o, find x

A 36^o
B 18^o
C 72^o
D 24^o

Question 45:

In the diagram above are two concentric circles of radii r and R respectively with center O. If r = ²/₃R, express the area of the shaded portion in terms of π and R

A ²¹/₂₅πR²
B ⁹/₂₅πR²
C ²¹/₂₃πR²
D ⁵/₉πR²