4, 9, 1, 4, 3, 40, ( )?

Question

what's the next in the numberal serie?
and why

Answer 1

4 is the answer. Here's how:
4 appears after a break of two numbers, so the number that follows 40 must be 4

Answer 2

4- Because the others changed and 4 remained the same on the second. So in the 3rd it is 4 again based on the series.
4,9,1
4,3,40
4,?,?
The last 2 cannot be determend
because it could be 3/9=3 or 9-6=3 ect.. and 1+39=40 or 40*1 ect...