Question

what is the next number in the pattern?
3,4,6,9,13

Answer 1

the answer is 18  ;)
3+1=4
4+2=6
6+3=9
9+4=13
13+5=18

Answer 2

18!! Because it adds by one then two then three then four and five so 3+1=4 4+2=6 6+3=9 9+4=13 13+5=18