Find the HCF of 255, 345, and 495?
- 5
- 12
- 15
- None of these
Explanation
Step 1: Find the prime factors of each number
255 = 3 × 5 × 17
345 = 3 × 5 × 23
495 = 3² × 5 × 11
Step 2: Identify the common factors
The common prime factors are 3 and 5.
Step 3: Calculate the HCF
HCF = 3 × 5 = 15
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