Learn about how triangle sequences, quadratic sequences and the common difference with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Non-linear sequences increase or decrease by different amounts each time. A number pattern is a series of numbers that follow a specific rule. Examples include: odd numbers, even numbers, square ...

87.55 An Elementary Approach to Finding All Square-Triangular Numbers Jingcheng Tong and Peter A. Braza The Mathematical Gazette , pp. 494-496 (3 pages) ...