Quizzes, puzzles, and brain teasers hold ... The teaser presents a series of unusual multiplication problems: "5 x 3 = 51, 5 x 5 = 52, 5 x 4 = 02, 5 x 6 = ??". This intriguing sequence has ...

If you're someone who enjoys flexing your mental muscles, especially with maths brain teasers, then you're in for a treat. A ...