Um, so you don't understand? Well, I just assigned this one specifically to you because if these problems are all too simple, anything else would be insulting to you. Remember it if you have time.
う～ん、わからんか。まあこれはあまり簡単な問題ばかりだったら失礼だから、君用に出しただけだから。余裕があったら覚えといて。