Treasure Hunt
Age 7 to 14
Challenge Level
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
Frogs
Age 11 to 14
Challenge Level
How many moves does it take to swap over some red and blue frogs? Do you have a method?
Simultaneous Equations Sudoku
Age 11 to 18
Challenge Level
Solve the equations to identify the clue numbers in this Sudoku problem.
A Change in Code
Age 14 to 16
Challenge Level
Can you find the percentage increase if the results appear in code?
Symmetricality
Age 14 to 18
Challenge Level
Five equations and five unknowns. Is there an easy way to find the unknown values?
Always Two
Age 14 to 18
Challenge Level
Find all the triples of numbers a, b, c such that each one of them plus the product of the other two is always 2.
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.