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Binomial Coefficients
An introduction to the binomial coefficient, and exploration of some of the formulae it satisfies.
Combinatorics
problem
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?
problem
Molecular sequencer
Age
14 to 18
Challenge level
Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.
problem
Even Squares
Age
11 to 14
Challenge level
Can you find squares within a number grid whose entries add up to an even total?