I Love 0

Since childhood Abir loved to play with numbers, one day he was counting numbers from 1 to 100 and he found out that there were 10 numbers that had 0 as it’s last digit. The numbers are 10, 20, 30, 40, 50, 60, 70, 80, 90, 100. He wants you to find how many numbers that have 0 as last digit from 1 to N.


This is a companion discussion topic for the original entry at https://toph.co/p/i-love-0