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 ...

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.

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) ...