# Resources tagged with: Codes and cryptography

Filter by: Content type:
Age range:
Challenge level:

### There are 12 results

Broad Topics > Cross-curricular Contexts > Codes and cryptography

### Unlocking the Case

##### Age 7 to 11Challenge Level

A case is found with a combination lock. There is one clue about the number needed to open the case. Can you find the number and open the case?

### Building up to Coding

##### Age 5 to 11

This article describes the underlying mathematical ideas and skills involved in the important mathematical application of coding.

### Cracking Codes

##### Age 5 to 11

Jenny Murray describes how she developed her interest in making and breaking codes.

### Substitution Cipher

##### Age 11 to 14Challenge Level

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

### The Best Card Trick?

##### Age 11 to 16Challenge Level

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?

### Substitution Transposed

##### Age 11 to 16Challenge Level

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

### Secondary Cipher Challenge Part 1

##### Age 11 to 16Challenge Level

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

### Transposition Cipher

##### Age 11 to 16Challenge Level

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

### Numbered Cars

##### Age 7 to 11Challenge Level

I was looking at the number plate of a car parked outside. Using my special code S208VBJ adds to 65. Can you crack my code and use it to find out what both of these number plates add up to?

### James's Code Challenge

##### Age 7 to 18Challenge Level

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

### Some Secret Codes

##### Age 7 to 11Challenge Level

Can you follow the rule to decode the messages?

### Cipher Challenge Toolkit

##### Age 11 to 18Challenge Level

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