rogerlewis101485 rogerlewis101485

03-02-2020
Mathematics

contestada

This one is hard, What number does it follow?

1,3,6,10,15,21,

Respuesta :

GrandNecro GrandNecro

03-02-2020

Its a sum of all previous iteration.

1=1

3=1+2

6=1+2+3

10=1+2+3+4

15=1+2+3+4+5

...

etc

Answer Link

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