Question

1 3 6 10 15 what's the name given to these number what's the next number

Answer 1

Answer: Triangular number sequence

Step-by-step explanation:

I'm not good at explaining but just trust me I took a test and it had the same question, I guessed the answer above and I got it right. If you can, do me a favor and give me a good rating if it turns out right for you too, which it'll most likely will, thanks and good luck!

Answer 2

Answer:

These are triangular numbers..

next number is 21

Step-by-step explanation:

They are added next to next numbers

for eg...

First number is 1

1+2=3

1+2+3=6

1+2+3+4=10

1+2+3+4+5=15

by that way next number will be

1+2+3+4+5+6 which is 21

In abacus they tell this as add series .

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