LCM of 1/3, 5/6, 5/4, 10/7 is_________?
Correct answer: B. 10
- A. 10/7
- B. 10
- C. 10/11
- D. 11/10
Explanation
For positive fractions, LCM = LCM of the numerators divided by HCF of the denominators. Hence LCM(1, 5, 5, 10) / HCF(3, 6, 4, 7) = 10/1 = 10. The likely mistake is choosing 10/7 by carrying the denominator 7 instead of taking the HCF of all denominators.
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