Find the HCF of the following numbers :
(a)  18, 48  (b) 30,42                (c)  18, 60   (d) 27, 63         (e)  36, 84       (f) 34, 102             

Explanation

To find the HCF (Highest Common Factor) of the given pairs of numbers, we will use the prime factorization method. Let's solve each part step by step.

### (a) HCF of 18 and 48

1. **Prime Factorization of 18:**
- 18 can be divided by 2: \( 18 \div 2 = 9 \)
- 9 can be divided by 3: \( 9 \div 3 = 3 \)
- 3 can be divided by 3: \( 3 \div 3 = 1 \)
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