What is the next number? 3 4 6 9 13 18 24

3 4 6 9 13 18 24

If you watch carefully, between the first two numbers 1 was added.

Then 2 was added to 4 to have 6.

3 added to 6 to give 9.

4 added to 9 to result to 13.

5 added to 13 to give 18.

6 added to 18 to give 24.

Therefore 7 would be added to 24 to give: 24 + 7 = 31.

So it is 31. Cheers.

So 3+x=4

3+1=4

4+x=6

4+2=6

notice the patern

3+1=4

4+2=6

6+3=9

9+4=13

13+5=18

18+6=24

so then next + must be 7

24+7=31