Nazotokine

Nazotokine (japanese title:ナゾトキネ) is anime series about puzzles.

Plot
Tokine Amino, is 22-years-old woman that is send to a world named Quizzun, where she must solve puzzles to escape and give Q-stones to a creature, named Hacchin; if another person is send to Quizzun, becomes part of the puzzle.