2 out of 3
Can you make the numbers around each face of this solid add up to the same total?
2 out of 3
Weekly Problem 29 - 2008
The seven pieces in this 12 cm by 12 cm square make a Tangram set. What is the area of the shaded parallelogram?
3 out of 3
Weekly Problem 3 - 2009
What fraction of the area of this regular hexagon is the shaded triangle?
1 out of 3
Weekly Problem 38 - 2011
Given three concentric circles, shade in the annulus formed by the smaller two. What percentage of the larger circle is now shaded?
2 out of 3
Imagine cutting out a circle which is just contained inside a semicircle. What fraction of the semi-circle will remain?
2 out of 3
Rotating a pencil twice about two different points gives surprising results...
1 out of 3
Weekly Problem 31 - 2014
Peri the winkle starts at the origin and slithers around some semicircles. Where does she end her expedition?
2 out of 3
A card with the letter N on it is rotated through two different axes. What does the card look like at the end?
1 out of 3
Find out how many pieces of hardboard of differing sizes can fit through a rectangular window.
1 out of 3
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?
