The next number is 4, followed by -2
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In the traditional counting system, the number that comes before 1 is 0. In mathematics, numbers are typically ordered in a sequence, with each number having a specific position. In this sequence, 0 is considered the number that precedes 1.
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.
The answer is 21.Your numerical series is the beginning of a mathematical sequence called Fibonacci Numbers.The first number of the sequence is 0, the second number is 1, and each subsequent number is equal to the sum of the previous two numbers of the sequence itself (i.e. 0, 1, 1, 2, 3, 5, 8, 13, 21, etc.).
25 is the next number that appears in that sequence.
It is 21 + 34 = 55