The latter-the former has
1, 8 ,- 1, 10,-3
Let's look at the relationship between alternating numbers: odd numbers are less than 2 and even numbers are greater than 2. The number that is not set should be 12.
So the next step is 27+ 12=39.
2.
be the same as the above
-2 1,35,-27,4 1,-33
Odd number difference is 6, even number increases by 6, and the next number is 4 1+6=47.
So the next number is 533+47=580.
3.
be the same as the above
1, 16,-7,24,- 15
Odd number is 8, even number is 8, and the number is 24+8=32.
So the next number is: 1253+32= 1285.
This method is very special, I hope you can understand and apply it.