Question

Of we write down at all the number from
1 to 145 (including I and 145), how many digits
will we write down?​

Answer 1

$\huge \color{lime}\maltese {\cal\color{orange}A \color{red}n \color{green}s \color{blue}w \color {purple}e \color {cyan}r}$

Total numbers = (145 - 1) + 1 = 144 + 1 = 145