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Resources tagged with Codes and cryptography similar to Stretching Fractions:

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Challenge level: Challenge Level:1 Challenge Level:2 Challenge Level:3

There are 9 results

Broad Topics > Applications > Codes and cryptography

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Substitution Transposed

Stage: 3 and 4 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Substitution and Transposition all in one! How fiendish can these codes get?

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Secret Transmissions

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

How can Agent X transmit data on a faulty line and be sure that her message will get through?

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The Best Card Trick?

Stage: 3 and 4 Challenge Level: Challenge Level:1

Time for a little mathemagic! Choose any five cards from a pack and show four of them to your partner. How can they work out the fifth?

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Transposition Cipher

Stage: 3 and 4 Challenge Level: Challenge Level:1

Can you work out what size grid you need to read our secret message?

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Substitution Cipher

Stage: 3 and 4 Challenge Level: Challenge Level:1

Find the frequency distribution for ordinary English, and use it to help you crack the code.

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Keeping it Safe and Quiet

Stage: 2, 3, 4 and 5

Simon Singh describes PKC, its origins, and why the science of code making and breaking is such a secret occupation.

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Cipher Challenge Toolkit

Stage: 3, 4 and 5 Challenge Level: Challenge Level:1

Our toolkit removes the drudgery of codebreaking while leaving you to do the hard thinking!

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Secondary Cipher Challenge Part 1

Stage: 3 and 4 Challenge Level: Challenge Level:2 Challenge Level:2

Here is the start of a six-part challenge. Can you get to the end and crack the final message?

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James's Code Challenge

Stage: 2, 3, 4 and 5 Challenge Level: Challenge Level:1

The Enigma Project's James Grime has created a video code challenge. Watch it here!