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LCM of two numbers is 138. But their (Greatest common divisor) GCD is 23. The numbers are in a ratio 1:6. Which is the largest number amongst the two?

Correct answer: B. 138

  • A. 46
  • B. 138
  • C. 69
  • D. 23

Explanation

Let the numbers be x and 6x because their ratio is 1:6. Their GCD is x and their LCM is 6x, so 6x = 138, giving x = 23 and the larger number 6 x 23 = 138. The likely mistake is choosing 23, which is the GCD and smaller number, not the larger number.

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