Sometimes you are given numbers expressed as a product of prime factors. For example, 8 = 2 3 and 90 = 2 × 3 2 × 5. If you want to find the LCM and HCF in an exam, we can use prime factor form ...

The lowest common multiple (LCM) is the smallest number that two or more numbers share - the first multiple that they both have in common. The multiples of \({3}\) are \({3}\), \({6}\) ...