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Q: What is the next number in this sequence 1 -1-2-3-5-8-13?

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If you mean: 1 2 3 5 8 13 then the next number is 8+13 = 21

The sequence is generated using cubes, or n^3. The next number in the sequence will be 4^3, or 256.

The next number is 4, followed by -2

25 is the next number that appears in that sequence.

Fibonacci found a way to present mathematical numbers so that each number in the sequence is the sum of the two previous numbers. For example, if the sequence starts at 0 and 1, then next number in the sequence is 1, the next number would be 2, and then the next number would be 3, and then 5.

16 is the next squared number.

The sequence indicates that one number is added to the previous number to find the value of the next number. Example 1 (+0) - 1 (+1) - 2 (+1) - 3 (+2) - 5 (+3) - 8 (+5) - 13. The next number in the sequence would be 21 (13 + 8).

You are multiplying each number in the sequence by -2. Therefore, the next number in the sequence after 32 is -64.

For an integral sequence the next number is 6 (add 5 subtract 7 pattern).

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34

This is a geometric sequence. Each number is multiplied by the same constant, to get the next number. If you divide any number by the previous one, you can find out what this constant is.

The next number in the sequence is 18. It's +1, +2, +3, +4, ....

If you mean: 1, 2, 4, 8 and 16 then the next number is 32

The next number in the sequence is... 64

You cant solve the next term (next number) in this sequence. You need more terms, because this is either a "quadratic sequence", or a "linear and quadratic sequence", and you need more terms than this to solve a "linear and quadratic sequence" and for this particular "quadratic sequence" you would need more terms to solve nth term, which would solve what the next number is. If this is homework, check with your teacher if he wrote the wrong sum.

The answer is 44. The sequence is adding nine to each number, assuming that the first number is supposed to be -1.

The next number in the sequence is 27. To get the next number, double the number and add one. Except for the second number, all the numbers in the sequence follow this rule.

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0.1

The next number in this sequence is 13112221.

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Descending (in a sequence) means that a the next number is "more negative" or "closer to negative infinity" or "less positive" or "further from positive infinity" or if n is a number in a sequence and n+1 is the next number then n/n+1 > 1

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I'm fairly sure you meant the "4" to be a "3" in this sequence. There is no "next number" in the sequence given, since there is no rule that encompasses the entire sequence. And to be fair, in number sequences, any number can still logically be "next". If it's not the number that you expect, it is still a number sequence. It is just not a predicable one.