15
10
57
One number does not make a sequence (nor a series).
The number 7 comes next.
15
175175
10
57
the numbers next in series are 35,43,51,... any two consecutive terms has a difference of 8
One number does not make a sequence (nor a series).
A single number, such as 12848384 does not make a series.
11 comes next.
The number 7 comes next.
There is no series of number: just one very large number!
10
mcmlx