yes it is
20
The pattern is plus 7. So the next number used to be 1.
next in the sequence: 10,20,30,20
22
The next number in the sequence will be 56.
20
10,20,30,20
There really is no way of telling, but my guess is 22.
10
25 is the next number that appears in that sequence.
The sequence appears to be decreasing with varying intervals: 50 to 33 (17), 33 to 25 (8), 25 to 20 (5), 20 to 17 (3), 17 to 14 (3), 14 to 13 (1), and 13 to 11 (2). The differences between the numbers suggest that the next number decreases by 1 from 11, resulting in 10. Therefore, the next number in the sequence is 10.
The pattern appears to be: subtract 6, add 17, subtract 14, add 9, subtract 7. Following this pattern, the next number should be obtained by adding 3 to the last number in the sequence, which is 6. Therefore, the next number in the sequence is 9.