What you’ll learn
Identify factors.
Key idea
A factor divides the target with a whole-number quotient and zero remainder.
Being smaller is not divisibility; the quotient must be whole with zero remainder.
Worked example
Classify examples and non-examples for the concept 'Identify factors'.
Is 3 a factor of 19? Classify using exact whole-number divisibility.
- Divide 19 by 3: quotient 6, remainder 1.
- A factor requires zero remainder; the proposed factor is not valid.
Answer: Non-example — 19=3×6+1; the nonzero remainder establishes the classification.
Quick Check
Classify examples and non-examples for the concept 'Identify factors'.
Is 5 a factor of 45? Classify using exact whole-number divisibility.