🧮 Mathematics
HCF & LCM Questions
Practise hcf & lcm for Class 6-8 with timed rounds, instant feedback and difficulty that adapts as you play.
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Class levels covered
∞
Fresh questions each round
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Mathematics
What is hcf & lcm?
The highest common factor is the largest number dividing a set exactly; the lowest common multiple is the smallest number they all divide into.
Why it matters
HCF and LCM solve grouping, scheduling and fraction problems, and appear across school and aptitude papers.
Key concepts you will practise
- Prime factorisation method
- Division (Euclid) method for HCF
- Relationship HCF × LCM = product of two numbers
- Word problems on bells, tiles and packing
Tips that save marks
- "Largest possible size / greatest number" usually means HCF; "next time together / least number" means LCM.
- Prime factorise once and read off both answers.
Question bank by class level
- Class 6-8 · Middle schoolGenerated each round
Frequently asked questions
Is HCF × LCM always equal to the product of the numbers?
For two numbers, yes. It does not extend directly to three or more.
What is the HCF of two co-prime numbers?
It is 1 — that is what co-prime means.