- Algebra 381
- Arithmetic 527
- Calculus 23
- Geometry & Trigonometry 341
- Other 195
- Statistics & Probability 198
If you know the perimeter of a right angled triangle, what can you say about the area?
What is special about the difference between squares of numbers adjacent to multiples of three?
Which armies can be arranged in hollow square fighting formations?
Can you see how to build a harmonic triangle? Can you work out the next two rows?
Can you find the volume of a cuboid, given its perimeters?
Can you work out how many members this choir has from these percentages?
Brian chooses an integer and operates on it. Work out the largest integer that he could have chosen.
Can you explain what is going on in these puzzling number tricks?
There are unexpected discoveries to be made about square numbers…
Find a factor of 248−1.
The area of a rectangle is 225 square units. Find its width.
Can you put these products in order of size?