The product of two numbers is 1600 and their HCF is 5. Find the LCM of the numbers.

8000

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1600

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320

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450

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Solution

The correct option is C 320
Let the two numbers be x and y.
It is given that:
$x \times y = 1600 H C F = 5$

We know that,

$H C F \times L C M = x \times y 5 \times L C M = 1600 \Rightarrow L C M = \frac{1600}{5} = 320$

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