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Eight Dominoes

Using the 8 dominoes make a square where each of the columns and rows adds up to 8

Rhombicubocts

Each of these solids is made up with 3 squares and a triangle around each vertex. Each has a total of 18 square faces and 8 faces that are equilateral triangles. How many faces, edges and vertices does each solid have?

Prime Magic

Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?

Shady Symmetry

Age 11 to 14
Challenge Level

 

Begin by looking at all the patterns that can be made by colouring in just 1 cell, then 2, then 3, and so on...