3, -6, 12, 4, 20, ?
20
22
The next is 3.
12
The next number in the sequence is 20. You are alternately multiplying the previous number by two and then subtracting two.
1.5
12The next number in the sequence is the previous # divided by 3. So, 324/3 = 108; 108/3 = 36; 36/3 = 12
Each following number in the sequence is being divided by 4. Therefore, the next number in the sequence is 3/4 = 0.75.
3
25
12 - 5(n-1)