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problem
Ten Green Bottles
7 to 11
Do you know the rhyme about ten green bottles hanging on a wall? If the first bottle fell at ten past five and the others fell down at 5 minute intervals, what time would the last bottle fall down?
problem
Queue
5 to 7
25 students are queuing in a straight line. How many are there
between Julia and Jenny?
problem
What Two ...?
7 to 11
56 406 is the product of two consecutive numbers. What are these two numbers?
problem
What Is the Question?
11 to 16
These pictures and answers leave the viewer with the problem "What
is the Question". Can you give the question and how the answer
follows?
game
Ducking and Dividing
7 to 11
Your vessel, the Starship Diophantus, has become damaged in deep space. Can you use your knowledge of times tables and some lightning reflexes to survive?
problem
Favourite
Overlapping Again
7 to 11
What shape is the overlap when you slide one of these shapes half way across another? Can you picture it in your head? Use the interactivity to check your visualisation.
problem
Equilateral Areas
14 to 16
ABC and DEF are equilateral triangles of side 3 and 4 respectively. Construct an equilateral triangle whose area is the sum of the area of ABC and DEF.