4
The next term is -2.
16 is the next number. All you do is sequentially add the next odd number. Therfore after 16 the next number would be 25... the next 36... the next 49... the next 54...
4
The sequence appears to follow a pattern where each number is derived from the previous two numbers. Specifically, the next number can be found by adding the last two numbers: 3 + (-1) = 2. Therefore, the next number in the sequence is 2.
add 2, add 4, take away 3. I don't know if it has a name.
The next term is -2.
4
312 211 110 3-1=2 2-1=1 1-1=0
The sequence represents the number of line segment ends in the previous letter. A,2,B,0,C,2,D,0,E,3,F,3,G,2,H,4,I,4,J,(2 or 3, depending on how it is written) and so on.
12
16 is the next number. All you do is sequentially add the next odd number. Therfore after 16 the next number would be 25... the next 36... the next 49... the next 54...
4
The sequence appears to follow a pattern where each number is derived from the previous two numbers. Specifically, the next number can be found by adding the last two numbers: 3 + (-1) = 2. Therefore, the next number in the sequence is 2.
add 2, add 4, take away 3. I don't know if it has a name.
5.
The next number in the sequence is 48.
The series appears to be alternating between adding and subtracting numbers. The pattern seems to be adding 1, then subtracting 2, then adding 3, and finally subtracting 4. Following this pattern, the next number in the series would be 1 (subtracting 4 from -1).