problem Seven Squares Age 11 to 14 Challenge level Watch these videos to see how Phoebe, Alice and Luke chose to draw 7 squares. How would they draw 100?
problem Finding factors Age 14 to 16 Challenge level Can you find the hidden factors which multiply together to produce each quadratic expression?
problem Training schedule Age 14 to 16 Challenge level The heptathlon is an athletics competition consisting of 7 events. Can you make sense of the scoring system in order to advise a heptathlete on the best way to reach her target?
problem Perimeter Expressions Age 11 to 14 Challenge level Create some shapes by combining two or more rectangles. What can you say about the areas and perimeters of the shapes you can make?
problem Your number was... Age 11 to 14 Challenge level Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?
problem Packing Boxes Age 14 to 16 Challenge level Look at the times that Harry, Christine and Betty take to pack boxes when working in pairs, to find how fast Christine can pack boxes by herself.
problem Folding in Half Age 14 to 16 Challenge level How does the perimeter change when we fold this isosceles triangle in half?
problem In Sum-mary Age 11 to 14 Challenge level What does the sum of these three numbers tell us about their product?
problem Symbol Age 11 to 14 Challenge level Using the new operator $\oplus$, can you solve this equation?
problem Factor List Age 14 to 16 Challenge level Tina has chosen a number and has noticed something about its factors. What number could she have chosen? Are there multiple possibilities?