He disappeared on Everest on June 8, 1924, alongside compatriot George Mallory, about 250 metres below the summit as they set off to complete the first documented ascent of the world’s tallest ...
Prolific puzzle inventor Henry Ernest Dudeney published the following problem in his 1917 book Amusements in Mathematics.The current version of the U.K.’s Union Jack flag was introduced in 1801.