-5.
The patterns seems to be "+9 +1 -20" repeat.
And, 15 - 20 = -5.
-5
-5
23
add 9 add 1 subtract 20 add 9 add 1
The given sequence uses numbers that correspond to letters in the alphabet (A=1, B=2, ..., Z=26). Translating the numbers, we get O (15), X (24), Y (25), E (5), N (14), O (15). The next letter after O (15) would be P (16), so the next number in the sequence is 16.
-5
-5
3
35
The answer is 35.
-5
24
25 every third number add 10 14 / 24 / 34 5 / 15 / 25 18 / 28 / (38) 14 5 18 24 15 28 34 25 38 44 35 48 54 45 58 64 55 68 74 and so on ...
15, 15, 20, 24, 25, 25, 30 Mode: 22 Median: 24
40.828
the answer is 14 over 25
23