Weekly Problem 33 - 2017
If the midpoints of the sides of a right angled triangle are joined, what is the perimeter of this new triangle?
Weekly Problem 2 - 2008
The diagram shows two semicircular arcs... What is the diameter of the shaded region?
Weekly Problem 48 - 2007
A 3x8 rectangle is cut into two pieces... then rearranged to form a right-angled triangle. What is the perimeter of the triangle formed?
Weekly Problem 21 - 2014
A parallelogram is formed by joining together four equilateral triangles. What is the length of the longest diagonal?
Weekly Problem 3 - 2012
Find out how many pieces of hardboard of differing sizes can fit through a rectangular window.
How does the perimeter change when we fold this isosceles triangle in half?
Weekly Problem 11 - 2012
A rectangular piece of paper is folded. Can you work out one of the lengths in the diagram?
Weekly Problem 40 - 2009
This quadrilateral has an unusual shape. Are you able to find its area?
Weekly Problem 23 - 2007
If two of the sides of a right-angled triangle are 5cm and 6cm long, how many possibilities are there for the length of the third side?
Weekly Problem 10 - 2010
Can you calculate the length of this diagonal line?
Weekly Problem 3 - 2011
What does Pythagoras' Theorem tell you about the radius of these circles?
Weekly Problem 5 - 2008
Calculate the ratio of areas of these squares which are inscribed inside a semi-circle and a circle.
Weekly Problem 20 - 2011
What is the perimeter of this unusually shaped polygon...
Weekly Problem 22 - 2006
A rectangular plank fits neatly inside a square frame when placed diagonally. What is the length of the plank?
Weekly Problem 5 - 2013
The diagram shows 8 shaded squares inside a circle. What is the shaded area?
Weekly Problem 14 - 2014
Triangle T has sides of lengths 6, 5 and 5. Triangle U has sides of lengths 8, 5 and 5. What is the ratio of their areas?
Weekly Problem 33 - 2007
Two circles touch, what is the length of the line that is a tangent to both circles?
Weekly Problem 19 - 2010
Three circles of different radii each touch the other two. What can you deduce about the arc length between these points?
Weekly Problem 49 - 2015
A window frame in Salt's Mill consists of two equal semicircles and a circle inside a large semicircle. What is the radius of the circle?
Weekly Problem 24 - 2008
The diagram shows two circles and four equal semi-circular arcs. The area of the inner shaded circle is 1. What is the area of the outer circle?
Weekly Problem 16 - 2014
The diagrams show squares placed inside semicircles. What is the ratio of the shaded areas?