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Small pepper seedlings in turquoise pots.
problem

Tangram Area

11 to 14

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?

Small pepper seedlings in turquoise pots.
problem

Triangle in a Hexagon

11 to 14

Weekly Problem 3 - 2009
What fraction of the area of this regular hexagon is the shaded triangle?

Small pepper seedlings in turquoise pots.
problem

Annulus Area

14 to 16

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?

Small pepper seedlings in turquoise pots.
problem

Circle in a Semicircle

14 to 16

Imagine cutting out a circle which is just contained inside a semicircle. What fraction of the semi-circle will remain?

Small pepper seedlings in turquoise pots.
problem

Pencil Turning

14 to 16

Rotating a pencil twice about two different points gives surprising results...

Small pepper seedlings in turquoise pots.
problem

Peri the Winkle

11 to 14

Weekly Problem 31 - 2014
Peri the winkle starts at the origin and slithers around some semicircles. Where does she end her expedition?

Small pepper seedlings in turquoise pots.
problem

Turning N Over

11 to 14

A card with the letter N on it is rotated through two different axes. What does the card look like at the end?

Small pepper seedlings in turquoise pots.
problem

Out of the Window

14 to 16

Find out how many pieces of hardboard of differing sizes can fit through a rectangular window.

Small pepper seedlings in turquoise pots.
problem

Right Angled Possibilities

14 to 16

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?

Small pepper seedlings in turquoise pots.
problem

Indigo Interior

14 to 16

The diagram shows 8 shaded squares inside a circle. What is the shaded area?

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