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Problems Puzzles and Games Home : Mathematics : Problems Puzzles and Games Directory Listing(s) • Calculators and UltraConverter offers interactive converters for distance, area, volume, mass, time, velocity, force, pressure, energy, power, density, flow, luminance, illuminance, temperature, and angles. • curiouser.co.uk offers paradoxical designs, puzzles, poems, and ideas. • Cut the Knot interactive mathematics miscellany and puzzles. • Free Puzzles offering geometry, logic, math, weight and other categories. • Math Cats creative, open-ended math explorations for children. Also includes cat and dog stories. • Mathpuzzle.com celebrates math puzzles and mathematical recreations. • Mathwizz problems and help for K-12, loan and mortgage calculators, and fun links. • QuickMath free automated service which provides solutions to all sorts of common mathematical problems within a couple of seconds. • The Problem Site provides math problems, brainteasers, and riddles online. These puzzles aid in developing problem solving and lateral thinking skills. • thrackle.org dedicated to John Conway's thrackle problem.

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