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Smith and Jones

Mr Smith and Mr Jones are two maths teachers. By asking questions, the answers to which may be right or wrong, Mr Jones is able to find the number of the house Mr Smith lives in... Or not!

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Binomial Coefficients

An introduction to the binomial coefficient, and exploration of some of the formulae it satisfies.

Spot the Card

Stage: 4 Challenge Level: Challenge Level:1
It is always worth looking at simpler cases and working systematically through different cases. For which number of cards can you do it in less moves.