Find the LCM of 5/2, 8/9, 11/14.

280

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360

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420

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None of these

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Solution

The correct option is D None of these
LCM of fraction

$= \frac{L C M o f n u m e r a t o r s}{H . C . F o f D e n o m i n a t o r s}$

Here, 5/2, 8/9, 11/14, so

LCM

$= \frac{L C M o f (5, 8, 11)}{H C F o f (2, 9, 14)} = \frac{440}{1} = 440$

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