The Next Number
Algebra
Level
pending
Try to find the answer to this problem: What comes next in this sequence? 1, 1, 2, 3, 5, 8, 13, _?
IDK
21
20
15
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1 solution
This is a famous sequence known as the Fibonacci sequence. Each term is calculated by adding the previous two: 1 + 1 = 2 , 1 + 2 = 3 , 2 + 3 = 5 , etc. The next term is 8 + 1 3 = 2 1 . The definition is simple, but there are many interesting properties of the sequence. Try these problems if you are interested in the sequence and related sequences:
Extremely large Fibonacci number
Lucas numbers and Fibonacci
Tribonacci