BOKAKE CLUSTER EXAMINATIONS END OF TERM 2, 2025

BOKAKE CLUSTER EXAMINATIONS
END OF TERM 2, 2025.
Kenya Certificate of Secondary Education (K.C.S.E)
121/1
MATHEMATICS
TIME: 2½ HOURS
INSTRUCTIONS TO CANDIDATES
1) This paper consists of two sections I and II.
2) Answer all the questions in section I and only five in questions from section II.
3) Show all steps in your calculations, giving your answers at each stage in the spaces provided.
4) Marks may be given for correct working even if the answer is wrong.
5) Non-programmable silent electronic calculators and KNEC mathematical tables may be used expect
when stated otherwise
SECTION I (50 MARKS)
1. Without using a calculator or a mathematical table, evaluate.
(3marks)
1
1
1 1 2
of 3 + 1  2 − 
2
2
2 2 3
3
1 1
of 2 
4
2 2
2. Three bulbs are programmed at intervals of 35, 45 and 65 seconds. What is the earliest time they
will light up simultaneously if the last time they did this was at 10.17am?
(3marks)
0
0
3. Two interior angles of an irregular polygon are each 144 the rest are 132 .Find the number of sides
of the polygon.
(3marks)
4. Use logarithm tables to evaluate.
(4marks)
10332 (31.4 ) 2