550+ Math Puzzles & Logic Problems50+ Math Puzzles & Logic Problemsde Jay JohnsonEdiciones (1)50+ Math Puzzles & Logic Problems (2018)CreateSpace Independent Publishing Platform · ISBN 9781717103796Más obras de Jay JohnsonAAmazing Mazes & More! (Barney)Amazing Mazes & More! (Barney)Barney's Amazing Mazes and MoreBBreak TimeBreak Time