It is a continue Addison of each new number let the answer be X . So now I am looking for X. How to fine X.
X + 1= 1
1 + 1 = 2
1 + 2 = 3
2 + 3 = 5
3 + 5 = 8
5 + 8 = 13
So now to fine X you make X to stand alone, collect like terms
X = 1 - 1
X = 0
So therefore the correct answer is 0
Thanks