Simply Graphs
Age 16 to 18
Challenge Level
Look for the common features in these graphs. Which graphs belong together?
Polite Numbers
Age 16 to 18
Challenge Level
A polite number can be written as the sum of two or more consecutive positive integers, for example 8+9+10=27 is a polite number. Can you find some more polite, and impolite, numbers?
Impossible Triangles?
Age 16 to 18
Challenge Level
Which of these triangular jigsaws are impossible to finish?
Fix Me or Crush Me
Age 16 to 18
Challenge Level
Can you make matrices which will fix one lucky vector and crush another to zero?
Vector Journeys
Age 14 to 18
Challenge Level
Charlie likes to go for walks around a square park, while Alison likes to cut across diagonally. Can you find relationships between the vectors they walk along?
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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.