Multiple choice

Three numbers are in ratio of 1 : 3 : 5. Their HCF is 6. Find the smallest number.

  1. 6

  2. 18

  3. 24

  4. 30

  5. None of these
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A Correct answer
Explanation

If the ratio is 1:3:5 and HCF is 6, the numbers are 1*6, 3*6, 5*6, which are 6, 18, 30. The smallest is 6.

AI explanation

Since the numbers are in a ratio, they can be expressed as 1x, 3x, and 5x. Given that their highest common factor is 6, the common multiplier x must be 6. Therefore, the smallest number is 1 multiplied by 6, which equals 6.

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