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Q.

Ravi wrote two digits of a 3-digit number on the blackboard as shown below.

$1 n 3$

If it has 11 and 13 as factors, then the missing digit n would be ____.

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Detailed Solution

Concept- The missing digit n is 4. So the number would be 143. Statement based questions can be solved using knowledge of prime number LCM and HCF.
Since 11 and 13 are prime numbers, that is they do not hav any of the other factors except of 1 and number itself so we can say that based on the statement.
Therefore, we will find the product of 11 and 13
=

Hence, the correct answer is 4

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