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  • Three numbers are in the ratio 1 : 2 : 4 and their LCM is...
Multiple choice

Three numbers are in the ratio 1 : 2 : 4 and their LCM is 280. Find their HCF.

  1. 15

  2. 30

  3. 45

  4. 40

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The ratio of three numbers is 1:2:4 1x, 2x, 4x and LCM = 280 1 x + 2 x + 4x = 280  7x = 280 x = 40 HCF = 40

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