PracticeQuestionsYears 1–7
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Factors, multiples and prime numbers

Year 5 · Upper Key Stage 2 · 5MD-2 — Find factors and multiples; identify prime numbers

Draft — awaiting teacher review

Builds on: Times tables to 12 × 12 and remainders (Year 4)

I

Concept Anchor

A factor divides a number exactly. A multiple is in that number's times table. A prime number has exactly two factors: 1 and itself. 1 is not prime.

Worked example

Find the factors of 12.

  1. 1.Find pairs that multiply to 12.
  2. 2.1 × 12, 2 × 6, 3 × 4.
  3. 3.Factors: 1, 2, 3, 4, 6, 12.
II

Guided Check

Is 21 a prime number?

    III

    Independent Diagnostic Practice

    Q1Year 55MD-2 — Identify a prime·Fluency·●○○Draft — awaiting teacher review

    Which number is prime?

    Q2Year 55MD-2 — Find all factors·Reasoning·●●○Draft — awaiting teacher review

    How many factors does 12 have?

    Q3Year 55MD-2 — Common multiples·Problem Solving·●●●Draft — awaiting teacher review

    Which number is a multiple of both 4 and 6?