Multiple choice

The LCM of three different numbers is $150$ Which of the following cannot be their HCF?

  1. $15$
  2. $25$
  3. $50$
  4. $55$
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D Correct answer
Explanation

The HCF of a set of numbers must be a divisor of their LCM. 150 is divisible by 15, 25, and 50, but not by 55.

AI explanation

The HCF of numbers must be a factor of their LCM. Looking at the options, 55 does not divide 150. Therefore, 55 cannot be the HCF.

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