24
What would be the next number in this series 15 12 13 10 11 8?
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
21
The pattern is - 5 then +2. 2 and 4 are the next numbers in the series.
21
24
What would be the next number in this series 15 12 13 10 11 8?
47
24
39
17
17 cause it is the next prime number
285
240
The series is n3: 13, 23, 33 ...The next number is 216.
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.