Other tags that relate to The Best Square
Codes and cryptography. STEM - General. Networks/Graph Theory. Logo. Algorithms. Combinatorics. Mathematical modelling. Logic. Programming. Practical Activity.There are 18 results
Broad Topics > Cross-curricular Contexts > Codes and cryptography
Stage 5 Cipher Challenge
Age 16 to 18
Challenge Level
Can you crack these very difficult challenge ciphers? How might you systematise the cracking of unknown ciphers?
Probably a Code?
Age 16 to 18
Challenge Level
Is the regularity shown in this encoded message noise or structure?
Keeping it Safe and Quiet
Age 14 to 18
Simon Singh describes PKC, its origins, and why the science of code making and breaking is such a secret occupation.
Cipher Challenge Toolkit
Age 11 to 18
Challenge Level
Our toolkit removes the drudgery of codebreaking while leaving you to do the hard thinking!
More Secret Transmissions
Age 16 to 18
Challenge Level
In 'Secret Transmissions', Agent X could send four-digit codes error free. Can you devise an error-correcting system for codes with more than four digits?
James's Code Challenge
Age 7 to 18
Challenge Level
The Enigma Project's James Grime has created a video code challenge. Watch it here!
The Best Card Trick?
Age 11 to 16
Challenge 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?
Transposition Cipher
Age 11 to 16
Challenge Level
Can you work out what size grid you need to read our secret message?
Substitution Transposed
Age 11 to 16
Challenge Level
Substitution and Transposition all in one! How fiendish can these codes get?
Secondary Cipher Challenge Part 1
Age 11 to 16
Challenge Level
Here is the start of a six-part challenge. Can you get to the end and crack the final message?
Secret Transmissions
Age 14 to 16
Challenge Level
How can Agent X transmit data on a faulty line and be sure that her message will get through?
NRICH is part of the family of activities in the Millennium Mathematics Project.