There are lots of different methods to find out what the shapes are worth - how many can you find?
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
Semi-regular tessellations combine two or more different regular polygons to fill the plane. Can you find all the semi-regular tessellations?
Given the products of diagonally opposite cells - can you complete this Sudoku?
This Sudoku puzzle can be solved with the help of small clue-numbers on the border lines between pairs of neighbouring squares of the grid.
Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?
Sequences of multiples keep cropping up...
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.
Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?
