Working systematically

A visualisation problem in which you search for vectors which sum to zero from a jumble of arrows. Will your eyes be quicker than algebra?

Use the clues about the shaded areas to help solve this sudoku

When I park my car in Mathstown, there are two car parks to choose from. Can you help me to decide which one to use?

Can you find the hidden factors which multiply together to produce each quadratic expression?

Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?

How can we make sense of national and global statistics involving very large numbers?

Can you match each graph to one of the statements?

Is it possible to find the angles in this rather special isosceles triangle?

in how many ways can you place the numbers 1, 2, 3 … 9 in the nine regions of the Olympic Emblem (5 overlapping circles) so that the amount in each ring is the same?

Find all the ways of placing the numbers 1 to 9 on a W shape, with 3 numbers on each leg, so that each set of 3 numbers has the same total.