There are 10 (one-zero) types of people in the world. Those who understand binary and those who don't.

There are two types of people in this world, people who use wi-fi and those use 4G.

There are 1/2 types of people in this world, those who understand fraction and those who don't.

There are three types of people in the world, those who can count and those who can't.

Thair are thoo tibes of peple in the wurld; those hoo kan spell wurds prawperly, ang though's hoo doon't.

There are IV types of people in this world: those who know Roman numerals and those who don't.

There are two types of people in the world. Those who finish sentences...

There are two types of people in this world. Those who have A.D.D* and those who - hey that's a hummingbird!

There are two types of people in the world: those who keep secrets and... well, I can't tell you the other type.

There are two types of people -- myself, and...why say more? 

Học sinh sinh viên:

Có 2 loại học sinh sinh viên, loại thứ nhất ngủ luôn, loại thứ hai đi học muộn.

 (From the Internet)

*A.D.D = Attention Deficit Disorder 

Bonus: