# Challenge #1 – Even Fibonacci numbers

Do you like solving puzzles as much as myself and my Demcon colleagues?

Then I got a challenge for you: can you solve Even Fibonacci numbers? Read the full challenge below.

I wish you good luck.

Pieter Bijleveld – Senior Software Engineer at Demcon

#decodedemcon

##### < ALL CHALLENGES

##### The challenge

Each new term in the Fibonacci sequence is generated by adding the previous two terms.

By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, …

**By considering the terms in the Fibonacci sequence whose values do not exceed four million,**

**find the sum of the even-valued terms*.**

Write your solution as efficiently as possible in one of the following languages: Python, C++, or C#.

*Official submissions are closed, but you can always send your solution to communication@demcon.com.*

* This problem is taken from Project Euler.