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Lowest Common Multiple

If the HCF an...

Question

If the HCF and LCM of two numbers are given as 5 and 100 and one of the numbers is 25, then the other number is

A

20

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B

24

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C

21

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Solution

The correct option is A 20
The product of two numbers = Product of their HCF and LCM.
So,
25 × the other number = 5 × 100
the other number = $\frac{5 \times 100}{25}$
= $20$

Hence, the other number = 20.

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