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Question
Find the HCF of the numbers in each of the following, using the prime factorization method:
84, 120, 138
Solution
The given numbers are 84, 120, and 138.
We have:
Now, 84 = 2 × 2 ×3 × 7
120 = 2 × 2× 2 ×3 × 5
138 = 2 × 3 × 23
∴ HCF = 2 × 3 = 6
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