(1+1)1 = 2 (2+1)2 = 621=(6+1)3 = 21 (21+1)4 = 88 So (88+1)5 = 445
The next number will be 13+21 = 34
The next number in the sequence 3-15-6-30-21 is -207.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
The next number is -21
To find the next number in the sequence 5, 15, 12, 24, 21, 21, 18, we can analyze the pattern. The differences between the numbers are: 10, -3, 12, -3, 0, -3. Following this pattern, the next difference would likely be 12, resulting in a next number of 18 + 12 = 30. Thus, the next number in the sequence is 30.
The next composite number after 20 is 21.
the next number is 21 because it is adding the last number stated.
The next number will be 13+21 = 34
28
The next number in the sequence 3-15-6-30-21 is -207.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
The next number is -21
Any number that you choose can be the next number. It is easy to find a rule based on a polynomial of order 5 such that the first five 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.In this case the simplest solution, based on a polynomial of order 4 ist(n) = (-77*n^4 + 874*n^3 - 3400*n^2 + 5321*n - 2676)/6 for n = 1, 2, 3, ... and accordingly, the next number is 693.
31
a
111221
21