Question

Look at this sequence of numbers: 0, 1, 2, 4, 6, 9, 12, 16, ? - what number should replace the question mark?​

Answer 1

20

Explanation:

I found that it is add 1, 0+1=1, 1+1=2, and then 2+2=4 and 4+2=6, and so on

Answer 2

20

Explanation:

After every two numbers the increment between the numbers increases by one.