Swimming Pool Tiles
Age 7 to 11
Challenge Level 
These Word documents might be useful. They already mark square numbers/prime numbers/triangle numbers on different sized grids: SquareNumbers, PrimeNumbers, TriangularNumbers.
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Exploring Wild & Wonderful Number Patterns
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.
Magazines
Let's suppose that you are going to have a magazine which has 16 pages of A5 size. Can you find some different ways to make these pages? Investigate the pattern for each if you number the pages.
Pebbles
Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?