1
1200, 300, 75, ... 11th term?
2
8, -16, 32, ... 29th term?
3
-9, 27, -81, ... 18th term?
4
72, 48, 32, ... 10th term?
5
4, 20, 100, ... 14th term?
6
-1, 5, -25, ... 15th term?
7
550, 440, 352, ... 22nd term?
8
3, -6, 12, ... 16th term?
9
20, -2, -24, ... 23rd term?
10
72, 48, 24, ... 12th term?
11
2, -10, -22, ... 32nd term?
12
the common difference of -9, -109, -209, ...
13
1692, 846, 423, ... 20th term?
14
the common difference of -16, -6, 4, 14, ...
15
the first term after the last of -39, -33, -27, -21, ...
16
-6, -3, 0, ... 15th term?
