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This code’s for oldies Brainteaser

by David Shaw, 12 December 2018 | 0 comments

Brain icon

If you’re sitting there twiddling your thumbs, see if you can decode this message. If you need a hint, you can always phone a friend! 3666882255533 443355544499 339987772

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Coded message brainteaser Brainteaser

by David Shaw, 21 March 2018 | 5 comments

Brain icon

You’ve just received a secret coded message: AD, BA, BH, CE, DB, DI, EF You know it follows a pattern, but can you work out what pair of letters come next?

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Caesar cipher Activity

by David Shaw, 3 March 2015 | 0 comments

Two circles with letters on them, held together with a split pin.

Learn the Caesar cipher, one of the oldest codes ever devised!

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Decoding binary numbers Activity

by David Shaw, 13 January 2014 | 4 comments

Zeroes and ones on a blue and green background. ©iStock.com\ivanastar

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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