1 out of 3
What proportion of people make 90% confident guesses which actually contain the correct answer?
1 out of 3
3 out of 3
Keep constructing triangles in the incircle of the previous triangle. What happens?
1 out of 3
Which curve is which, and how would you plan a route to pass between them?
1 out of 3
In this short challenge, can you use angle properties in a circle to figure out some trig identities?
1 out of 3
Draw any triangle PQR. Find points A, B and C, one on each side of the triangle, such that the area of triangle ABC is a given fraction of the area of triangle PQR.
1 out of 3
In this question we push the pH formula to its theoretical limits.
1 out of 3
Here is a chance to play a version of the classic Countdown Game.
1 out of 3
Here are several equations from real life. Can you work out which measurements are possible from each equation?
2 out of 3
Match the descriptions of physical processes to these differential equations.
