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1. 16, 19, 21

2. 81, 243, 729,

3. 25, 31

4. 20/24, 19/24

5. 37

Step-by-step explanation:

1. The numbers are going up by +3 ( 1 + 3 = 4,     4 + 3 = 7 etc..)

2. The numbers are being multiplied by 3 ( 3 x 3 = 9,      9 x 3 = 27 etc..)

3. Numbers are going up by +2

4. Numbers are decreasing by 1/24 ( 23/24 - 1/24 = 22/24 etc..)

5.

12 - 7 = 5

22 - 12 = 10 (5*2)

82 - 57 = 25 (5*5)

We can see a pattern here and the pattern is that the numbers are increasing according to the x5.

Hence 22 + (5*3) = 37

step-by-step explanation: