A puzzle on the properties of numbers, can be made as challenging as you like. The aim is to arrange the headings and numbers in a grid which works! Cut out all the numbers and/or headings and arrange!! I have provided a mixture of grids depending on how difficult you would like to make it. I have provided one solution (dont let students see it) but I am not sure if another arrangement will work. Will hopefully create some interesting observations (e.g. a number cannot be both odd and even).