Keep constructing triangles in the incircle of the previous triangle. What happens?
Which curve is which, and how would you plan a route to pass between them?
Match the descriptions of physical processes to these differential equations.
A circle is inscribed in an equilateral triangle. Smaller circles touch it and the sides of the triangle, the process continuing indefinitely. What is the sum of the areas of all the circles?
In this short challenge, can you use angle properties in a circle to figure out some trig identities?
Yasmin and Zach have some bears to share. Which numbers of bears can they share so that there are none left over?
During the third hour after midnight the hands on a clock point in the same direction (so one hand is over the top of the other). At what time, to the nearest second, does this happen?
This problem is designed to help children to learn, and to use, the two and three times tables.
