Answer: This is an educated guess. It *MAY* be 10. 5x7=35 but there is no 5, but 10 is a multiple of 5.
Explanation:
If you look at 2, the next one is 4. 2x2=4 so by that logic 5x2=10
Just in case, wait for a different answer shawty.
I am not very confident in my answer-