Question 31

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

Solution

In question given that the missing Number Has 11 and 13 as factor , so the number must be divisible by 11 and 13

By multiplying 11 and 13 we get 143, 143 is the only number that can have factor 11 and 13 ( having 3 at unit place and 1 at hundred place )

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