# Blog

## Magic calculator

By David Shaw, 27 March 2016

Are you a magician? Or a mathematician! Guess someone’s number with this cool trick.

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## Binary for beginners

By David Shaw, 14 January 2014

Binary is a way of writing numbers using two digits, typically represented by 1 and 0. It takes some practice to be able to read binary, but it’s the basis of how almost all computers do arithmetic!

## Decoding binary numbers

By David Shaw, 13 January 2014

Written by Gabrielle Tramby In this activity you’ll do maths like a computer. It’s a bit tricky, so younger readers may want to read the ‘What’s Happening?’ section first.

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