If this is your questions. Here is the answer for you.
Challenge always triggers our brain. Fitto Challenge will help you and your friend to solve questions at the same time.
Questions answering by this way will surely help your brain to store it and stay in your long term memory.
Beauty of Questions in Challenge are nothing but from PYQ Repeats only.
Once you complete 30% of the Total Questions from a particular subject at PYQ, then these questions will be reflected in Challenge Questions.