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To find the **Highest Common Factor (HCF)** of 18 and 12, we can use the following steps:

1. **List the factors** of each number:
   - Factors of 18: 1, 2, 3, 6, 9, 18
   - Factors of 12: 1, 2, 3, 4, 6, 12

2. **Identify the common factors**:
   - Common factors of 18 and 12: 1, 2, 3, 6

3. **Choose the highest factor**:
   - The highest common factor is **6**.

So, the HCF of 18 and 12 is **6**.

Would you like more details or have any other questions?

Here are 5 related questions you can try:
1. What is the HCF of 24 and 36?
2. Find the least common multiple (LCM) of 18 and 12.
3. How do you calculate the HCF using prime factorization?
4. Can the HCF of two numbers be larger than the smaller number?
5. What is the relationship between HCF and LCM of two numbers?

**Tip:** To find the HCF quickly, use prime factorization by breaking down each number into its prime factors, then take the common primes with the lowest powers.

Find the Highest Common Factor (HCF) of 18 and 12.

Learn how to find the Highest Common Factor (HCF) of 18 and 12 with a detailed step-by-step solution. Suitable for Grades 5-7, this problem involves understanding factors and using the HCF formula to solve.

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