Find the HCF of 120, 320 and 420.

Explanation

To find the HCF (Highest Common Factor) of the numbers 120, 320, and 420, we will follow these steps:

### Step 1: Prime Factorization of Each Number
We will start by finding the prime factorization of each of the three numbers.

**For 120:**
1. Divide by 2: \(120 \div 2 = 60\)
2. Divide by 2: \(60 \div 2 = 30\)
...