See also https://www.dailymail.co.uk/femail/food/article-3573250/Unlimited-chocolate-bar-riddle-solved-Trick-mystery-missing-square-revealed-mind-bending-video.

See also https://www.dailymail.co.uk/femail/food/article-3573250/Unlimited-chocolate-bar-riddle-solved-Trick-mystery-missing-square-revealed-mind-bending-video.html https://www.dailymail.co.uk/femail/food/article-3573250/Unli... Sorry about the source