20
The answer is: 12.
The answer is 109. 21 + (1 x 28) = 49 22 + (2 x 28) = 78 25 + (3 x 28) = 109
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.
28?
20
12
20
18
20
The answer is: 12.
14
14
20? Just a guess
6
The pattern appears to be that n1 is defined as 25; n2 = n1 + 3; n3 = n2 - 4 = n1 - 1. If this is the pattern, the next number would be 25. If this is the pattern, the series would repeat endlessly: 25, 28, 24, 27,23, 26, 22, 25, , 28, 24, 27,23, 26, 22, ...
The answer is 109. 21 + (1 x 28) = 49 22 + (2 x 28) = 78 25 + (3 x 28) = 109