2 out of 3
Can you fit the tangram pieces into the outline of the sports car?
2 out of 3
Can you picture where this letter "F" will be on the grid if you flip it in these different ways?
2 out of 3
How can you paint the faces of these eight cubes so they can be put together to make a 2 × 2 × 2 cube that is green all over AND a 2 × 2 × 2 cube that is yellow all over?
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
Here are two kinds of spirals for you to explore. What do you notice?
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.
