Chapter 2 · Class 6 ICSE · Formula Sheet

HCF & LCM Formulas — Class 6 ICSE

Learn to find the highest common factor and lowest common multiple using prime factorization.

Key Formulas

HCF (Prime Factorization)

\text{HCF} = \text{Product of common prime factors with lowest powers}

LCM (Prime Factorization)

\text{LCM} = \text{Product of all prime factors with highest powers}

HCF-LCM Relation

\text{HCF}(a,b) \times \text{LCM}(a,b) = a \times b

Co-prime Numbers

\text{HCF}(a,b) = 1

Worked Examples

1Using: Application

Apply the key formula from this topic to a sample problem.

Step 1: Identify the formula.

Step 2: Substitute the values.

Step 3: Simplify to get the answer.

Answer: See solution above

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Frequently Asked Questions

How many formulas are in Class 6 ICSE HCF & LCM?+

There are 4 formulas in the HCF & LCM chapter for Class 6 ICSE. Each formula is essential for solving problems in this topic.

How to remember HCF & LCM formulas easily?+

Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.

Are these HCF & LCM formulas enough for exams?+

Yes, these formulas cover the complete ICSE Class 6 syllabus for HCF & LCM. Practice applying them to different types of questions for full exam readiness.

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