Indian Defence Review on MSN

A 29-Year-Old South Korean Mathematician Just Cracked a Geometry Puzzle That Had Gone Unsolved Since the 1960s

A decades-old geometry puzzle has finally been solved by a young mathematician in South Korea. Hidden behind a simple hallway ...
Bored Panda on MSN

81 hard riddles that'll challenge even the smartest minds

Solving hard riddles is good for you! And if you were searching for a thorough selection of hardest riddles, look no further ...