The numbers are fluctuating between adding 0.4, and subtracting 0.2. Therefore, after 1.8 and 2.2, would come 2, 2.4, 2.2, 2.6, 2.4.
14 08
92 - 18 = 72 72 - 16 = 56 56 - 14 = 42 42 - 12 = 30 30 - 10 = 20 20 is the next number in the sequence.
22 they increase by 4 each time
It is 4n+2 and so the next number is 18
22
4
14 08
18
10. Then 12, 14, 16, 18, 20, 22, 24, etc.
18
18
(14 + 18)/2 = 16
92 - 18 = 72 72 - 16 = 56 56 - 14 = 42 42 - 12 = 30 30 - 10 = 20 20 is the next number in the sequence.
Based on the sample you have provided, I see that 4 numbers, counting by 2 from 12 to 18, form a repeating sequence. I would expect that the next 4 numbers in this series would again be 12, 14 16, and 18.
18
This appears to be two interwoven sequences. The first sequence, increases by 9 then 19......7 + 9 = 16........8 + 19 = 27 The second sequence decreases by 8 then 18....16 - 8 = 8........27 - 9 = 18 The next number would thus be 9 + 29 = 38.
22 they increase by 4 each time