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  • Number Theory: Divisibility and Factors
  • Find the HCF and LCM of 25, 65
Multiple choice

Find the HCF and LCM of 25, 65

  1. 5, 325

  2. 1,90

  3. 325, 5

  4. 90,1
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A Correct answer
Explanation

[Explanation: Prime factors of 25= 5 x 5 Prime factors of 65= 13 x 5 LCM of 25 and 65= 5 x 5 x 13= 325 Now, HCF= Product of numbers/LCM= (25 x 65)/325= 5]

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