Once you have mastered the first ten numbers – from 0 to 9 – and understood the system that gets you to 19, it is quite easy to figure out how to count to 100, 1,000, 1,000,000.

This is true for many things. You need to put in the work in the beginning to learn the basics and understand the system, then things will get gradually easier as you do more of the same.

If you keep skipping the 7 when you count 3, 4, 5, 6, 8, all you can do is repeat until you get it right.

There is no shortcut.