Question

how many digits are needed to write down all numbers from 1-20?

Answer 1

Answer:

To write all these numbers down, we need to use 9 + 180 + 2700 + 4 = 2893 digits to accommodate the 9 single-digit numbers, the 90 double-digit numbers, the 900 triple-digit numbers and the number 1000.

Answer 2

There are 31digits are needed to write down all the numbers from 1-20