Four 4s

By TADASHI FUKUZAWA on AppTrack Ninja.

A Brain-Training Math Puzzle!

Four 4s: A Brain-Training Math Puzzle! Is your brain feeling a little rusty lately? Introducing "Four 4s," the historic math puzzle born in Great Britain in 1881, now available as an iPhone app! The rules are very simple. In "Four 4s," you just arrange four "4"s and operator panels like +, -, ×, and ÷ to create an equation. Your challenge is to make the answer equal every number from 0 to 100. It looks easy, but it's deceptively deep. Can you use your full insight and mathematical mind to complete all the numbers? It's as easy as moving the panels with your finger, like "44 × (4 - 4) = 0"! Bu…

Categories: Games, Puzzle, Education

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