EASTERN CLUSTER EVALUATION-2025 121/1 MATHEMATICS PAPER 1

EASTERN CLUSTER EVALUATION-2025
KENYA CERTIFICATE OF SECONDARY EDUCATION (K.C.S.E)
121/1
MATHEMATICS
PAPER 1
JULY/AUGUST, 2025
TIME: 2½ HOURS
SECTION I: ATTEMPT ALL THE QUESTIONS
1. Without using mathematical tables or a calculator, evaluate the following leaving your answer in
𝑝
the form ⁄𝑞 where p and q are integers.
(2 marks)
0.084 ×3.9 ×0.3
5.2 ×0.012 ×2.1
2.
3.
Find the mean, mode and median of the following data.
(3 marks)
8, 9, 7, 8, 6, 10, 5, 11, 8, 6, 7
Using tables of reciprocals, square roots and cubes and giving your answer correct to 2 decimal
places, evaluate
2
12.56
+ √0.12 − (0.25)3
5𝑥𝑦−2𝑥 2 +12𝑦 2
(4 marks)
4.Simplify the expression
5.During a clearance sale, a salesman sold an item to a customer at Sh 2850 after allowing a discount
of 5% on the marked price. The marked price of the item was 75% of the actual cost of the item.
Determine the percentage loss incurred by the salesman.
(3 marks)
The line 𝑦 = 𝑚𝑥 + 6 makes an angle of 75.99° with the 𝑥 − 𝑎𝑥𝑖𝑠. Find the coordinates of the
point where the line cuts the 𝑥 − 𝑎𝑥𝑖𝑠.