Question: What is the HCF of 408 and 1032?Solution:The prime factorisation of 408 is 2 × 2 × 2 × 3 × 17The prime factorisation of 1032 is 2 × 2 × 2 × 3 × 43Thus, the product of the prime factors of 2 × 2 × 2 × 3 is 24Hence, the HCF of 408 and 1032 is 24.