Sharpen your Skills
Practising a mathematical skill doesn't need to be tedious... dust off your angle, algebra and adding fractions skills, and put them to good use solving this set of problems!
Almost One Age 11 to 14
Challenge Level
Challenge Level
Choose some fractions and add them together. Can you get close to 1?
Triangles in Circles Age 11 to 14
Challenge Level
Challenge Level
Can you find triangles on a 9-point circle? Can you work out their angles?
Cyclic Quadrilaterals Age 11 to 16
Challenge Level
Challenge Level
Draw some quadrilaterals on a 9-point circle and work out the angles. Is there a theorem?
The Simple Life Age 11 to 14
Challenge Level
Challenge Level
The answer is $5x+8y$... What was the question?
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.