HCF and LCM – Group 4 Topic Quiz

About this quiz

This quiz has 30 multiple-choice questions on HCF and LCM, from the Aptitude (Quantitative) unit of the TNPSC Group 4 Aptitude & Mental Ability syllabus. * Time allowed: 40 minutes * Each question has four options and only one correct answer * No negative marking * Pass mark: 35% * Each answer comes with an explanation after you submit Topics covered: * Factors, Multiples and Prime Factorisation * Finding the HCF * Finding the LCM * The HCF-LCM Relation and Fractions Syllabus reference: HCF and LCM

How it works

• Move freely between questions, mark them for review and change answers until you submit.
• The clock runs until you submit. When time is up, your answers are submitted.
• Pause any time — continue later here or in the app with the time you had left.
• You won't see right or wrong while you answer.
• After you submit: your score, rank, the correct answers and explanations.
• A submitted attempt is final and cannot be changed.
• Wrong answers lose marks (negative marking).
• XP is given once; a retake earns more only if you beat your best score.

Sample questions

1. 1The Highest Common Factor (HCF) of two or more numbers is also called the ________.

   • AGreatest Common Divisor (GCD)
   • BLeast Common Multiple (LCM)
   • CLowest Common Denominator
   • DGreatest Common Multiple

2. 2What is the prime factorisation of 90?

   • A2 × 45
   • B2² × 3 × 5
   • C2 × 3² × 5
   • D3 × 5 × 6