Think of a number, square it and subtract your starting number. Is there something special about the number you are left with?

Play around with this question for a while and then visit Wild Maths for some help or a further challenge.

Wild Maths encourages students to explore maths beyond the classroom and is designed to nurture mathematical creativity. The site is aimed at 7 to 16 year-olds, but open to all. It provides games, investigations, stories and spaces to explore, where discoveries are to be made. Some have starting points, some a big question and others offer you a free space to investigate.

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