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problem
Favourite
Cut It Out
7 to 11
Can you dissect an equilateral triangle into 6 smaller ones? What number of smaller equilateral triangles is it NOT possible to dissect a larger equilateral triangle into?
problem
Tangrams
5 to 11
Can you make five differently sized squares from the interactive tangram pieces?
problem
Constant Counting
5 to 7
You can make a calculator count for you by any number you choose.
You can count by ones to reach 24. You can count by twos to reach
24. What else can you count by to reach 24?
problem
Penta Primes
7 to 11
Using all ten cards from 0 to 9, rearrange them to make five prime
numbers. Can you find any other ways of doing it?
problem
Rope Mat
7 to 11
How many centimetres of rope will I need to make another mat just
like the one I have here?
problem
Favourite
Numerically Equal
7 to 11
Can you draw a square in which the perimeter is numerically equal to the area?
problem
Back to School
7 to 11
Mr. Sunshine tells the children they will have 2 hours of homework.
After several calculations, Harry says he hasn't got time to do
this homework. Can you see where his reasoning is wrong?
problem
An Average Average Speed
14 to 16
My average speed for a journey was 50 mph, my return average speed
of 70 mph. Why wasn't my average speed for the round trip 60mph ?
