Question

How to solve this problem

Answer 1

The answer is 1
- One is the most frequent digit used for writing numbers between 1-1000
- its because 1 has 1 in it and 1000 also has one in it so it can't be other numbers from 1-9
- It can't be zero as zero is not repeated as much as 1
- so the answer is 1

Answer 2

The answer is 1 .

there are 11 zero digits, 21 one digits, and 20 each of the rest of the digits