-5
-5
-5.The patterns seems to be "+9 +1 -20" repeat.And, 15 - 20 = -5.
add 9 add 1 subtract 20 add 9 add 1
6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25
-5
-5
-5
3
35
The answer is 35.
-5.The patterns seems to be "+9 +1 -20" repeat.And, 15 - 20 = -5.
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 ...
5/8 + 7/12 = 15/24 + 14/24 = 29/24 = 1 and 5/24.
25
The next number after 15 will be 3. You are sequentially adding 9, adding 1, and dividing by 5.
add 9 add 1 subtract 20 add 9 add 1