Factors and multiples (LCM, HCF/GCD) — KCSE Mathematics
KCSE Mathematics · 101 practice questions · 4 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Find the prime factorisation of a number and use it to determine all factors of the number
Calculate the Lowest Common Multiple (LCM) and Highest Common Factor (HCF/GCD) of two or more numbers using prime factorisation
Apply LCM and HCF to solve word problems involving repeated events, sharing and grouping
Factors and multiples (LCM, HCF/GCD)
Sample Questions
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State the largest number of crates that can be evenly divided into groups of 12 and 16. (2 marks)
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State the least number of bicycles that can be arranged in rows of 6, 8, or 10 without any remaining bicycles. (3 marks)
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Using prime factorisation, calculate the HCF and LCM of the numbers 18 and 30. (4 marks)
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Why Practise Factors and multiples (LCM, HCF/GCD)?
KNEC Aligned
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