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problem
Four in a Row
11 to 14
Where should black play in this game of four-in-a-row to be certain of winning on her next move?
problem
Angular Reflection
11 to 14
Weekly Problem 28 - 2013
Two lines meet at a point. Another line through this point is reflected in both of these lines. What is the angle between the image lines?
Two lines meet at a point. Another line through this point is reflected in both of these lines. What is the angle between the image lines?
problem
Table Height
14 to 16
A table has blocks of wood placed on and next to it. Can you work out how tall it is?
problem
Walk the Plank
14 to 16
A rectangular plank fits neatly inside a square frame when placed diagonally. What is the length of the plank?
problem
Right-angled Request
11 to 14
Weekly Problem 26 - 2006
How many right angled triangles are formed by the points in this diagram?
How many right angled triangles are formed by the points in this diagram?
problem
Family Fortune
11 to 14
If three brothers will get £20 more if they do not share their money with their sister, how much money is there?