Concept:Each number in the series is the sum of the two preceding numbers. This is the Fibonacci sequence.Explanation:Start with 0 and 1. Add them to get 1. Then add 1 and 1 to get 2. Next, 1 + 2 = 3. Then 2 + 3 = 5. Then 3 + 5 = 8. The next term is 5 + 8 = 13.
