6
One number does not make a sequence (nor a series).
57
10
The number 7 comes next.
mcmlx
One number does not make a sequence (nor a series).
There is no series of number: just one very large number!
A single number cannot define a sequence, even less a series.
57
10
A series is a set of partial sums of sequences of numbers. A single number, such as 135, does cannot define a series.
The number 7 comes next.
It is: 4554
mcmlx
11 comes next.
The number that comes next in the series 1 2 2 5 3 10 is 7. You get this number by subtracting the number 3 from the number 10.
10