1EM Unit 1 – Primes, HCF and LCM
Learning Objectives:
 Understand the definition of prime numbers and composite numbers.
 Determine whether a whole number is prime or composite.
 Express a composite number as the product of its prime factors, i.e., perform the prime factorisation.
 Solve problems involving perfect square, perfect cube, square root, or cube root using prime factorisation.
 Find the highest common factor (HCF) and the lowest common multiple (LCM) of two or more whole numbers.
 Solve problems involving the realworld applications of prime numbers, HCF and LCM.
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