Worked Example
Revision challenge 9
For Class 6 Mathematics, explain or solve a hcf (highest common factor) question from the chapter "Playing with Numbers". Focus on revision challenge and show the working clearly.
Step-by-step solution path
- Read the topic idea: HCF (Highest Common Factor).
- Recall the core explanation from the chapter: Factors, multiples, prime numbers, HCF and LCM — the building blocks of number theory.
- Use the related formula "Divisibility by 9" as the main tool while solving.
- Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on HCF (Highest Common Factor). A strong solution should identify the correct data, apply Divisibility by 9, and explain each transition instead of jumping directly to the answer.
Related formula
Divisibility by 9
Sum of all digits divisible by 9