in 5 days someone get to level 10

Question

please i saw someone that join sololearn 5 days back and he is now in level 10
pls can someone explain this to me?
today he earn 10000xp, how come?

Answer 1

I can't remember now. Does the platinum badge give 10K XP?

Answer 2

only challenge? 🙃

Answer 3

Challenges