MARANDA HIGH SCHOOL, THE MOCK EXAMINATIONS, 2025

MARANDA HIGH SCHOOL, THE MOCK EXAMINATIONS, 2025
Kenya Certificate of Secondary Education
121/1
MATHEMATICS
PAPER 1
May/June, 2025
TIME: 2½ Hrs
Instructions to candidates:
a) This paper consists of two sections: Section I and Section II.
b) Answer all the questions in Section I and only five questions from Section II.
c) Show all the steps in your calculations, giving your answers at each stage.
d) Marks may be given for correct working even if the answer is wrong.
e) Non-programmable silent electronic calculators and KNEC Mathematical tables may be used, except
where stated otherwise.
SECTION I (50 marks)
Answer all the questions in this section.
1. Solve for T in the equation
1
T
4 2
=
1
3
15÷3 of 24−10
5 22
2
+ ×111
6 39
.
(4 marks)
2. A motorist travelling at a steady speed of 120 km/h covers a section of a highway in 10minutes. To
minimize accidents a speed limit is imposed. Travelling at the maximum speed allowed, the motorist
takes 5 minutes longer to cover the same section. Calculate the speed limit imposed.
(3 marks)
3. The figure below shows a cyclic quadrilateral ABCD inside a circle of centre and angle ADC=1130.