PinnedInCantor’s ParadisebyFederico Kereki·Oct 25, 2025A Puzzle With Sums and FactorialsGeneralizing an interesting puzzleA response icon3A response icon3
PinnedFederico Kereki·Oct 13, 2025Of Hexagonal Numbers, Pythagorean Runs, and New Old DiscoveriesFinding longer “pythagorean” equalities
PinnedInStackAnatomybyFederico Kereki·Nov 17, 2021Forever Functional: the SeriesIf you’re interested in Functional Programming, you’ll surely be interested in this series.
PinnedInCantor’s ParadisebyFederico Kereki·Sep 8, 2020A Totally New, Very Old Method for Finding Square RootsA new iterative method to approximate square roots is found — but proven to be centuries old!A response icon1A response icon1
PinnedInGlobantbyFederico Kereki·Oct 20, 2020PEG away at evaluating expressions in JavaScriptSafely evaluate expressions in JavaScript in a simple yet powerful way, by using a Parsing Expression GrammarA response icon1A response icon1
InPuzzle SpherebyFederico Kereki·Jun 27Out of the Box: Solving Geometry Puzzles without Geometry!Lateral thinking can solve puzzles without getting into details
InPuzzle SpherebyFederico Kereki·Jun 17A card-switching puzzle, by the numbersFinding several solutions to a puzzle from a movie
InPuzzle SpherebyFederico Kereki·Mar 21Finding the right seat puzzle, by the numbersGeneralizing, extending, and simulating a puzzle about random seating on a plane
InPuzzle SpherebyFederico Kereki·Mar 10A Die Game Puzzle by the NumbersSolving a two-person game puzzleA response icon1A response icon1
InPuzzle SpherebyFederico Kereki·Mar 7The Memory Game by the NumbersMaximum, minimum, and expected number of turns for best play
