Why do challenges include stuff I haven't learnt yet?

Question

So I just challenged my friend, but there were questions that I've never learnt about. Why? How do I fix that?

Answer 1

Alternatively, you may temporary block challenges you're unfamiliar with by tapping on the cog icon on top right when you open the Challenge. 😉

Answer 2

Challenge questions come from the complete course.
It is better for you to complete to course before playing challenges!

Answer 3

Challenges on Sololearn aren't affected by your current progress in a language, meaning they will just throw any random question at you. One way to make the questions a little easier is by challenging lower level people, but even then you may have a harder question given.

Answer 4

The person I challenged was same level as me. But thanks!