Question

if you write down all the numbers from 1 to 100 , then how many times do you write 3

Answer 1

I write 10 times in jointly I write 9 times and in separately I write only one time

Answer 2

3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93 so we write 3 19 times