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Algebra Level pending

One digit doesn'tbelong to the collection ... 1,1,2,3,4,5,8,13,21...


The answer is 4.

Apdalla Mohamed by Apdalla Mohamed , 27, Egypt

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3 solutions

Subhajit Das
May 28, 2014

Too easy..... Its the Fibonacci series where the next number is the sum of the previous two numbers.

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Not really. Most Fibonacci definitions start with a 1.

Vamsi Saladi - 6 years, 11 months ago

The series must start with 0 to be a Fibonacci series.

Amit Patil - 7 years ago

not a correct fibonacci series

Noman Wahid - 6 years, 11 months ago
Bharath Spidy
Jul 3, 2014

The sequence is 1,1,2,3,4,5,8,13,21

1+1 = 2

1+2 = 3

2+3 = 5

3+5 = 8

5+8 = 13

8+13 = 21

In this order 4 is the odd number

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Lenard Arceo
Jun 22, 2014

1+1=2+3=5 so it passed the 4

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