Ratio Challenge
A simple randomised ratio challenge where students practise simplifying ratios, finding equivalent ratios and solving missing-value ratio questions using visual ratio…
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Mathematics · Number
Enigma — Can You Crack the Code?
Break four intercepted messages: a shift cipher (brute force), a substitution cipher (frequency analysis with real English data), a keyword cipher (repeats and common factors) and a working Enigma machine (cribs, logic and an automated bombe-style search). Then count the keys with multiplication, factorials and scientific notation.
Years 8–10ChallengeCodes and Ciphers
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Enigma — Can You Crack the Code? is one of the licensed interactives in The Education Universe. This page describes it; teachers use it in lessons and classes with a licence or the free trial.