Weekly Problem 37 - 2014
Which of the five diagrams below could be drawn without taking the pen off the page and without drawing along a line already drawn?
Weekly Problem 13 - 2012
The diagram shows contains some equal lengths. Can you work out one of the angles?
Weekly Problem 1 - 2011
Use facts about the angle bisectors of this triangle to work out another internal angle.
Weekly Problem 4 - 2008
In the figure given in the problem, calculate the length of an edge.
Can you find the radius of the circle inscribed inside a '3-4-5 triangle'?
Weekly Problem 27 - 2014
Four congruent isosceles trapezia are placed in a square. What fraction of the square is shaded?
Weekly Problem 23 - 2008
A triangle has been drawn inside this circle. Can you find the length of the chord it forms?
How high is the top of the slide?
Weekly Problem 12 - 2016
The diagram shows a square PQRS and two equilateral triangles RSU and PST. PQ has length 1. What is the length of TU?
Weekly Problem 41 - 2016
The diagram shows a square, with lines drawn from its centre. What is the shaded area?
Weekly Problem 29 - 2010
An isosceles triangle is drawn inside another triangle. Can you work out the length of its base?
Weekly Problem 21 - 2012
Two rectangles are drawn in a rectangle. What fraction of the rectangle is shaded?
Weekly Problem 43 - 2017
The diagram shows a semicircle inscribed in a right angled triangle. What is the radius of the semicircle?
Weekly Problem 34 - 2008
What is the area of the region common to this triangle and square?
Weekly Problem 15 - 2015
In the diagram, two lines have been drawn in a square. What is the ratio of the areas marked?
Weekly Problem 44 - 2009
A garden has the shape of a right-angled triangle. A fence goes from the corner with the right-angle to a point on the opposite side. How long is the fence?
Weekly Problem 8 - 2010
Are you able to find triangles such that these five statements are true?