The series appears to increase as follows: 1 (+3), 4 (+5), 9 (+7), 16,, etc. If so, the next number in the series would be 25 (16 + 9).
* * * * *
While mathematically equivalent, a simpler description is:
12, 22, 32, 42, 52 ...
10
21
To find the next number in the series 364758, we can look for a pattern. Observing the digits, it appears that the series alternates between increasing and decreasing sequences. After 8, the next logical number could be 9, following the pattern of increasing by 1. Therefore, the next number in the series may be 9.
This is the Fibonacci Series, where each term is the sum of the previous two. It continues 21, 34, 55 etc
59 is the next number in this series.
The next number is -21
the answer will be 21
10
225
This is the series of square numbers, (16= 4*4). The next number is 5*5=25.
21
21
21
21.
A single number, such as 12848384 does not make a series.
The next number is 25 but there are the sequence is infinite so there can be no end to the sequence.
12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50