Question

Replace * by the smallest number divisible by 9-91*67

Answer 1

The smallest number that can be replaced by * is 4 because we know that to be divisible by 9, the sum of digits must be divisible by 9. here 9+1+*+6+7 = 23 + *
The nearest number that is divisible by 9 is 27 so 23 + * = 27
or * 4