KS3 maths foundation worksheets on factors, multiples, prime and composite numbers, with examples and full worked answers.

Teach factor pairs, positive multiples and prime/composite numbers with clear examples and printable practice. Students list all factors, find common factors and the greatest common factor, list positive multiples and find the least positive common multiple. Includes why 1 is neither prime nor composite and why 2 is the only even prime.

14 printable A4 pages include eight worked examples, visual counter arrays, 30 questions, guided practice, independent classification, grouping and repeated-event contexts, mixed reasoning and full worked answers with exemplars. Five practice pages each have six spaced working boxes. Allow two or three lessons according to readiness. No calculator needed.

Suitable for Year 6 consolidation and Year 7 preparation or intervention. No factor trees, prime factorisation, index notation, formal divisibility tests or square-root notation. Non-editable PDF for individual purchaser use with their own students. First pack in the Number Properties family; familiar methods or values may recur in future complete units.