What comes next in the pattern?

13, 24, 17, 29, 21, 34, 25, 39,

29, 44, 33,?,

43 is the answer because it goes up 11 down 7

49. The pattern is every time you add, you add the next positive number number and every time you subtract, you add the next negative number.

Step-by-step explanation:

13 + 11 = 24

24 - 7 = 17

17 + 12 = 29

29 - 8 = 21

21 + 13 = 34

34 - 9 = 25

25 + 14 = 39

39 - 10 = 29

29 + 15 = 44

44 - 11 = 33

33 + 16 = 49