India, April 21 -- Suppose you walk up a escalator that is itself moving up. Do you count more steps or fewer compared to moving up a stationary staircase of the same length? What happens if you walk ... Read More
India, April 14 -- In the 1850s, some three decades before the international Date Line was established, the author and mathematician Lewis Carroll puzzled over a question of time. I quote: "Suppose yo... Read More
India, March 24 -- The way people listen to music has evolved very rapidly. Although the gramophone was before my time, I grew up on the record player and then the tape recorder before the CD and then... Read More
India, March 17 -- Some weeks ago, a reader wrote to me that Einstein puzzles were becoming frequent and repetitive in Probelmatics. While I appreciate the reader's keenness on variety, the fact remai... Read More
India, Feb. 21 -- Delhi's Jantar Mantar, currently undergoing the first steps of a planned restoration, has four instruments that are a mix of science and mystery. Three of them were set up by the Raj... Read More
India, Feb. 20 -- Delhi's Jantar Mantar, currently undergoing the first steps of a planned restoration, has four instruments that are a mix of science and mystery. Three of them were set up by the Raj... Read More
India, Jan. 27 -- Logic has sometimes been defined as mathematics without numbers, while some may argue that mathematics is actually logic with numbers. For puzzlers, it all boils down to the same thi... Read More