10
14
14
24
30!
The series is a sequence of three numbers, the second number is 3 greater than the first, and the third number is 5 greater than the second. (or 8 greater than the first) 20 + 3 = 23 : 23 + 5 = 28 14 + 3 = 17 : 17 + 5 = 22 11 + 3 = 14........is therefore the next number in the sequence.
Look at the difference between each number and the next number.
18
The next number is 17. You're adding 8, and then subtracting 5. So; 2 + 8 = 10 10 - 5 = 5 5 + 8 = 13 etc... 19 - 5 = 14 14 + 8 = 22 22 - 5 = 17
10
8
2245
17