In more than 70 books, Gardner produced lay guides to Einstein's Theory of Relativity; ambidexterity and physical symmetry; the bath plug vortex (the phenomenon by which bathwater in the northern hemisphere drains in an anticlockwise direction and clockwise in the southern hemisphere); and even the concept of God. He also published fiction, poetry and literary and film criticism as well as puzzle books.He will be missed.
In The Numerology of Dr Matrix (1967) Gardner investigated links between numerals and the occult, asking (for example) what is special about the number 8,549,176,320? (A: It is the 10 natural integers arranged in the order of the English alphabet.)
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