[DUPLICATE] XP System on challenges

Question

Hey guys.I have a doubt about the xp system when we're challenging. Like sometimes I challenge a person to earn 1xp, and at the end get 6xp maximum if win, and if I miss a question or more lose about 32-28xp. Why that happens? How the XP system works?
Hope you help with this one.
=Nelson Lobo=

Answer 1

https://www.sololearn.com/faq/#q13
https://en.m.wikipedia.org/wiki/Elo_rating_system

You have a high xp level in html. If you challenge someone with low xp level in that language you will not get much xp and they will get lots if they win against you

Answer 2

Elo Rating system.Now I got it. Because the one with high level has more chances to win.
Thanks @Jay.