Question

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

1

?

3

Find the missing digit if it has 11 and 13 as factors?

Answer 1

$\Rightarrow$ The given factors are $11$ and $13$.

$\Rightarrow$ The three digit number $=11\times 13=143$

1

4

3

$\therefore$ The missing digit is $4$