problem Fraction Match Age 5 to 11 Challenge level A task which depends on members of the group noticing the needs of others and responding.
problem Mixing Lemonade Age 11 to 14 Challenge level Can you work out which drink has the stronger flavour?
problem Diminishing Returns Age 11 to 14 Challenge level How much of the square is coloured blue? How will the pattern continue?
problem Reductant ratios Age 16 to 18 Challenge level What does the empirical formula of this mixture of iron oxides tell you about its consituents?
problem the greedy algorithm Age 11 to 14 Challenge level The Egyptians expressed all fractions as the sum of different unit fractions. The Greedy Algorithm might provide us with an efficient way of doing this.
problem Keep it simple Age 11 to 14 Challenge level Can all unit fractions be written as the sum of two unit fractions?
problem The genes of Gilgamesh Age 14 to 16 Challenge level Can you work out the parentage of the ancient hero Gilgamesh?
problem Investigating the dilution series Age 14 to 16 Challenge level Which dilutions can you make using only 10ml pipettes?
problem Counting Fish Age 14 to 16 Challenge level I need a figure for the fish population in a lake. How does it help to catch and mark 40 fish?
problem All tangled up Age 14 to 18 Challenge level Can you tangle yourself up and reach any fraction?