3 years ago

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

1 answer:

8 0

This is part of the Fibonacci sequence. The next number is 21. Look at how much each number increases and the number before it.

1+1=2 (the number after 1 and 1)
1+2=3 (the number after 1 and 2)
2+3=5 (the number after 2 and 3)

So to solve we add 13+8=21

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