3 1.5
24, 65.
The next is 3.
1.5
10
612
25
8 and then 1.6
Yes, that's what a geometric sequence is about.
Each number is decreasing by 3. The next numbers in the sequence would be -18, -21, -24, -27, -30.
16
21
A single number, such as 4642142824816 does not constitute a sequence.