Don't you think time to answer questions on challenges is too short?

Question

Does SoloLearn give the same amount of time independently of the difficulty of questions or does it vary? Does it have an algorithm to calculate the mean time people answer the questions?
I could answer several questions correctly (by my own, without searching the answer in the net), but I frequently run out of time...

Answer 1

yes, I also feel the same for some questions. Reading the question itself a lot of time for me.

Answer 2

I believe that when time is not enough to think and answer, people start to guess. Then, "luck" will define the winner, not knowledge...