Why has the number of xp gotten from winning challenges reduced?

Question

As I levelled up the number of xp gotten from challenges have reduce. Currently getting 1or 2xp from winning aside that of the questions answered. And when I lose about 27xp is deducted.

Answer 1

That is because you have gotten more experience and more XP so now you're a higher ranking challenger.

Answer 2

My ans is same as Prometheus’ Answer

Answer 3

Thank you very much, now I understand