27.
16 (add 3 every time).
The next number is 27. Nice puzzle! The reason is on discussion page, for those who are still working on it.
This is a peculiar number sequence which follows the following rule: +7, -4, +8, -3, +9, -2... The next few functions would be +10, -1, +11, -0 And thus the next few numbers in the sequence would be 17+10=27, 27-1=26, and so on. The sequence in total goes 2, 9, 5, 13, 10, 19, 17, 27, 26, 37, 37.
27
27.
27, 26, 37, 37
16 (add 3 every time).
The next number is 27. Nice puzzle! The reason is on discussion page, for those who are still working on it.
45
This is a peculiar number sequence which follows the following rule: +7, -4, +8, -3, +9, -2... The next few functions would be +10, -1, +11, -0 And thus the next few numbers in the sequence would be 17+10=27, 27-1=26, and so on. The sequence in total goes 2, 9, 5, 13, 10, 19, 17, 27, 26, 37, 37.
17
27
17 cause it is the next prime number
next 27 alternating > 2 5 10 17 = +3 +5 +7 so next is +9 (add 2 each time) 9 13 19 = +4 +6 so next is +8 (add 2 each time) 2 5 10 17 26 37 50 65 82 101 ... 9 13 19 27 37 49 63 79 97 117 ... becoming 2 9 5 13 10 19 17 27 26 37 37 49 50 63 65 79 82 97 101 117 ...
28 (add on the prime number 11)
The next number in the sequence is 27.