Question 4 - Relations among Number Sequences - Chapter 1 Class 6 - Patterns in Mathematics (Ganit Prakash)

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Question 4 Which sequence do you get when you start to add the counting numbers up? Can you give a smaller pictorial explanation?The counting numbers are: 1, 2, 3, 4, 5, ... When we start adding them up, we get: 1 1 + 2 = 3 1 + 2 + 3 = 6 1 + 2 + 3 + 4 = 10 1 + 2 + 3 + 4 + 5 = 15 This gives the Triangular Numbers sequence: 1, 3, 6, 10, 15, 21, … Pictorial representation of triangular numbers are