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Any number can be the next number. It is easy to find a rule based on a polynomial of order 4 such that the first four numbers are as listed in the question followed by the chosen next number. There are also non-polynomial solutions. Short of reading the mind of the person who posed the question, there is no way of determining which of the infinitely many solutions is the "correct" one.
The simplest solution, based on a polynomial of order 3, is
T(n) = (-19n^3 + 143n^2 - 331n + 246)/3 where n = 1, 2, 3, ...
and accordingly, the next number is 53.
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What is the next number in this sequence 13 6 11 9 9 12 7?
15
What is the next number in the sequence 5-7-13-31?
The next number in the sequence 5-7-13-31 is 69.
What number is next in this sequence 3 4 6 9 13?
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.
Next number in sequence 40 42 21 24 8 12 13?
If the last number is 1/3 (it should be), the next number is 5 and 1/3
What is the next number in the sequence 8 13 5 15 20 12?
There really is no way of telling, but my guess is 22.
What is the next number in this sequence 2 3 10 12 13?
20
What is next in this number sequence 10 7 11 12 9 13 14?
11
What is the next number in sequence 10 7 11 12 9 13 14?
11
What is the next number in this sequence 10 7 11 12 9 13 14?
11.
What is the next number in this sequence 13 6 11 9 9 12 7?
15
What is the next number in the sequence 5-7-13-31?
The next number in the sequence 5-7-13-31 is 69.
Next number in sequence 10 8 7 14 15 13 12 24 25?
21
What number you s next in this sequence 2 3 10 12 13 20 21?
22
What number is the next logical number in the following sequence of numbers 11 12 13 14 15 16?
17?
What number is the next logical number in the following sequence 6 9 8 11 10 13 12?
15
What number is next in this sequence 3 4 6 9 13?
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.
What number is next in this sequence 2 9 5 13 10 19 17?
The next number in the sequence is 27.
