TNPSC Group IV · Aptitude and Mental Ability Test
HCF and LCM
Highest common factor and lowest common multiple problems.
Test yourself on HCF and LCM
5 real TNPSC Group IV questions with instant answers — no signup, ~3 minutes.
Study notes are still being prepared.
Don't wait — Shishya can teach you this topic right now, on demand.
Ask Shishya to teach this →Need more? Ask Shishya
Shishya is your personal tutor for this topic. Pick a starter or open a free chat.
- Go deeper on this topicGo deeper on HCF and LCM for TNPSC Group IV — examples and edge cases I should know.
- Show me exam shortcutsGive me 3 fastest shortcuts to solve HCF and LCM questions in the exam.
- What mistakes should I avoid?What are the most common mistakes students make on HCF and LCM? How do I avoid them?
- Quiz me adaptivelyQuiz me on HCF and LCM — start with one easy question, then go harder based on how I answer.
Practice this topic
Take a full mock →Q1 · HCF and LCM · EASY
Find the HCF of 24 and 36.
Q2 · HCF and LCM · MEDIUM
The LCM of two numbers is 120 and their HCF is 10. If one number is 40, find the other number.
Q3 · HCF and LCM · MEDIUM
Three bells ring at intervals of 9, 12 and 15 minutes respectively. If they ring together at 8:00 AM, at what time will they ring together again?
Q4 · HCF and LCM · MEDIUM
Find the smallest number which when divided by 12, 15, and 20 leaves a remainder of 5 in each case.
Q5 · HCF and LCM · HARD
The HCF of two numbers is 23 and their LCM is 1449. If one of the numbers is 161, find the other number.