If the HCF and LCM of two numbers are given as 5 and 100 and one of the numbers is 20, then the other number is ___.

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Solution

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

Hence, the other number = 25.

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