📘 Chapter 3 · Multiples & Factors
Multiples, factors, prime numbers, LCM and HCF — number building blocks.
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✍️ Practice
1. Multiples
List the first FEW multiples (commas, smallest first).
First 5 of 4 =
First 4 of 7 =
First 3 of 9 =
Smallest multiple of 12 =
2. Factors
All factors, smallest first.
Factors of 12 =
Factors of 18 =
Factors of 16 =
Factors of 7 =
3. Prime or not?
Type "yes" or "no".
Is 11 prime?
Is 9 prime?
Is 13 prime?
Is 51 prime?
4. LCM (Lowest Common Multiple)
LCM of 4 and 6 =
LCM of 3 and 5 =
LCM of 4 and 5 =
LCM of 6 and 8 =
5. HCF (Highest Common Factor)
HCF of 12 and 18 =
HCF of 8 and 12 =
HCF of 10 and 15 =
HCF of 18 and 27 =
6. Divisibility & even/odd
Is 240 divisible by 10? (yes/no)
Is 246 divisible by 3?
34 is __ (even/odd)
21 is __
📝 Chapter Exam
25 mixed questions, hard timer of 30 sec per question. Navigate freely between questions, mark for review, and submit when ready.
- ✓ All answers reviewed at the end with the correct answer + 💡 rationale
- ✓ Optional email delivery to a parent at submission
- ✓ Star rating + XP awarded based on your score