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Problematics | Family planning

India, Aug. 4 -- George J Summers is the author of several books on puzzles, including Mensa puzzles, but I could not find any biographical information on him from either a Google search or an AI quer... Read More


Problematics | One for you, one for me

India, July 21 -- We learn some properties of numbers early in life, such as all products of 9 having a digital root of 9, and all single-digit multiplications with 37 leading to products with three r... Read More


Problematics | The roots of a card trick

India, July 14 -- By a happy coincidence, just weeks after we discussed digital roots and how they can help in determining if a number is a perfect square, I came across the concept again. To recap, t... Read More


Problematics | Calculating her name

India, July 7 -- This week marks a milestone with the 150th consecutive episode of Problematics. The puzzles are intended to be special, with the first one (my own creation) having been saved up for s... Read More


Problematics | Find the square

India, June 23 -- I learnt something new and interesting recently. Most puzzle solvers, including you readers of Problematics, probably know this already, but here it is anyway. To check if a number i... Read More