Dean started this challenge by thinking about the heading cards and where they could be placed based on his knowledge of number properties.
He realised that the 'numbers less than 20' and 'numbers more than 20' needed to be placed on the same side of the gameboard to avoid a clash.
From here, Dean then realised that this mathematical thinking would help him to place the other heading cards around the game board correctly. He noticed that 'even numbers' and 'odd numbers' also needed to be placed on the same side of the board. Similarly, 'triangular numbers' and 'square numbers' did not have many possible answers on the number cards provided, so Dean realised that it would be best to work with these heading cards and the relevant numbers before attempting the others. In this way, he knew that the remaining number cards were more versatile and that he could place them in different places because they shared common number properties. With strong perseverance, Dean was able to successfully complete the puzzle independently.