How do you get the rule of 1,3,6,10,15,21,28

Question

Mathematics

Madyson Munoz

15 December, 14:31

How do you get the rule of 1,3,6,10,15,21,28

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Answers (2)

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Camilla Graham · Answer 1

It's simply the triangular numbers: 1=1 1+2=3 1+2+3=6 1+2+3+4=10 and so on. You could use the formula n (n+1) / 2 to determine the nth triangular number (ie the sum of the first n numbers)

Fabian Mitchell · Answer 2

Well, the sequence is basically generated by a triangle order.

You need to add a new row of dots beneath the other one every time you've completed one triangle