Since being posted, the image has attracted over 150 comments, with users debating the correct number of triangles. Answers vary widely, with guesses ranging from as few as 5 to over 20. Many have ...

A number pattern is a series of numbers that follow ... The name can be understood by looking at diagrams of triangles made of dots. The triangle has one dot on the first row, two on the second ...

Learn about number patterns in arithmetic sequences with ... Other sequences Learn about how triangle sequences, quadratic sequences and the common difference with this BBC Bitesize Maths article.