If the last number is 1/3 (it should be), the next number is 5 and 1/3
15
The next number in the sequence 5-7-13-31 is 69.
The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.
There really is no way of telling, but my guess is 22.
The pattern is plus 7. So the next number used to be 1.
20
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.
11
11
11.
15
The next number in the sequence 5-7-13-31 is 69.
21
22
15
17?
The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.