In order to write counting up to 100 how many times the key of the typewriter will have to be pressed?

In order to write counting up to 100 how many times the key of the typewriter will have to be pressed?

Explanation

We know, there are 9 one-digit numbers,

90 two-digit numbers and 1 three-digit number. Therefore, the typewriter must be pressed 192 keys

ND23-6-2023