Yes, let me show you the numbers 1–10 in one-hand gesture.
Why these gestures are like that?
Gestures of 1–5 are easy to understand, right? How about 6–10? Every single digit in Chinese has its own character, these gestures look like their character. That’s it.
The gesture of 10 is not often used because it has too many meanings and can easily cause ambiguity. It’s like you are warning somebody and say: fuck me off, or I will punch in your face!
Crossed index finger (with your both hands) is more commonly used gesture for representing the number of 10 (十). It’s also an imitation of the Chinese character.