###### Asked in Miscellaneous, Math and Arithmetic

Miscellaneous

Math and Arithmetic

# Which number should come next in the series 1-1- 2-3-5-8-13?

678

## Answer

###### Wiki User

###### 03/16/2013

21

add the two previous numbers

in this case 8+13=21

add the two previous numbers

in this case 8+13=21

It's called a Fibonacci sequence

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