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What is the HCF of 21, 84 and 49 ?1. 12. 73. 214. 3 |
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Answer» Correct Answer - Option 2 : 7 Given: Numbers = 21, 84 and 49 Concept used: If a, b and c are three numbers then their HCF will be the multiplication of the common factors taken from their prime factorization. Calculations: Prime factorization of 21, 84 and 49 can be written as, 21 = 3 × 7 84 = 3 × 4 × 7 49 = 7 × 7 HCF = 7 ∴ The HCF of 21, 84 and 49 is 7. |
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