Patterns 1

Algebra Level 3

What's the next number?

1 , 0 , 2 , − 1 , 4 , − 4 , 9... 1, 0, 2, -1, 4, -4, 9...


The answer is -12.

David Lee by David Lee , 20, USA

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2 solutions

David Lee
May 4, 2014

First we start at 1. then we subtract 1, then add 2, then subtract 3, then add 5, then subtract 8, and so on. 1, 1, 2, 3, 5, 8 are fibonacci numbers, so our answer is -12.

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Did it the same way :) Good ,question

Ashish Menon - 5 years, 1 month ago
Jaimin Pandya
Jan 11, 2015

Alternate addition & subtraction of Fibonacci numbers ; f(n) = Fibonacci numbers

1st : 0 + f(1) = 0 + 1 = 1

2nd : 1 - f(1) = 1 - 1 = 0

3rd : 0 + f(2) = 0 + 2 = 2 and so on ......

by doing this we'll get -12 answer

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