GRADE 4 · MATHEMATICS · TOPIC 4

Factors and Multiples

A factor divides exactly; prime numbers have exactly two factors.

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CONCEPT EXPLAINED

Understand the concept

A factor divides exactly; prime numbers have exactly two factors.

SOLVED EXAMPLE

Is 29 prime?

  1. Step 1: Test 2 3 and 5
  2. Step 2: None divides 29 exactly
  3. Step 3: Only 1 and 29 remain.

Final answer: Yes

PRACTISE YOURSELF

Is 21 prime?

Show the answer

No

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