2025 CCHY PRELIMS P1 Q2

2025 CCHY PRELIMS P1 Q2

Secondary 4
3 marks
  1. Express \(252\) as a product of its prime factors.[1]
  2. The highest common factor (HCF) of two numbers is \(21\). The lowest common multiple (LCM) of the two numbers is \(252\). Both numbers are less than \(100\). Find the two numbers.[2]

Solution:

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Answer:(a) \(2^2\times3^2\times7\) (b) \(63,84\)

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