Your Solutions - Stage 3 & 4

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.