96 because you are multiplying by 2, so 6 x 2 is 12, 12 x 2 is 24, 24 x 2 is 48, 48 x 2 is 96, etc.
The next is 3.
It could be almost anything. One possibility is 36.
The given pattern appears to alternate between two sequences: one sequence that doubles the previous number (3 to 6 to 12) and another that adds 1 to the previous number (4 to 20). Following this pattern, after 20, the next number in the doubling sequence would be 24, as it continues from 12. Thus, the next number in the pattern is 24.
If the last number is 1/3 (it should be), the next number is 5 and 1/3
10
The next is 3.
612
8 and then 1.6
25
96 (each number is twice the previous)
A single number, such as 4642142824816 does not constitute a sequence.
16
21
It could be almost anything. One possibility is 36.
If the last number is 1/3 (it should be), the next number is 5 and 1/3
Think it's 30...then 20
10