Multiplying, dividing and mixed operations · Usually met around P4
Factors and multiples
From “Multiples” to “Lowest common multiple”, step by step, each skill with its methods, worked examples and answers.
Skills in this topic, easy to hard
- MultiplesDivides exactly: a multiple. They never end
- FactorsFind them in pairs; stop when the pair meets
- Prime and composite numbersTry 2, 3, 5 and 7 in turn
- Prime factorisationDivide by 2, 3, 5… until only primes are left
- Common factors and common multiplesList both and ring what's in both
- Highest common factorShort division: multiply the divisors
- Lowest common multipleShort division: divisors × last quotients
Practise it in the game →Factors and multiples · Free to start, unlimited questions, no downloadAll maths topics →