HCF of two numbers is 1 and LCM is 253. If one of the two numbers is 11, find the other.

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Solution

The correct option is C 23
Let the unknown number be $x$ .
Second number is 11.
Now, HCF $\times$ LCM = product of the two numbers
$\Rightarrow$ $1 \times 253 = 11 \times x$
$\Rightarrow$ $x = 23$

$∴$ The unknown number is 23.

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