Secret Code

Explore and solve encrypted maths puzzles, in which numbers are replaced by letters or symbols, with this free online course. Discover maths puzzles, explore their history and practise problem-solving techniques. You’ll explore: + Cryptarithms - puzzles where the digits have been replaced by letters. + Symbologies - puzzles where [...]

Get a taste of spy training, and learn how you can keep your secrets safe with a course designed for 13-18 year olds. What does it take to be a spy? Strong critical thinking and communication skills, a firm grasp of logic, and a love of puzzles are all [...]