Mathematics Past Questions and Answers

There are m boys and 12 girls in a class. What is the probability of selecting at random a girl from the class?

A \(\frac{m}{12}\)
B \(\frac{12}{m}\)
C \(\frac{12}{m+12}\)
D \(\frac{12}{m-12}\)

Question 917:

Simplify \(7\frac{1}{2}-\left(2\frac{1}{2}+3\right)\div16\frac{1}{2}\)and correct your answer to the nearest whole number

A 33
B 8
C 7

Question 918:

The angle of elevation of the top of a tower from a point on the ground which is 36m away from the foot of the tower is 30^o. Calculate the height of the tower.

A 62.35m
B 20.78m
C 18.00m
D 10.39m

Question 919:

Find the area of a rectangle of length 4cm and whose diagonal is 6cm, (Leave your answer in surd form)

A 8√3cm²
B 12√3cm²
C 16√2cm²
D 16√3cm²

Question 920:

Given that x + y = 7 and 3x-y = 5, evaluate \(\frac{y}{2}-3\).

A -1
B 1
C 3
D 4