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README.md

Fibonacci Rabbits

Description

Level: easy
Author: PS

Everyone loves rabbits!

http://46.101.107.117:2201

Solution

For this challenge we are given a website that contains several images of rabbits:

Upon closer inspection, we can see that the images contain fibonacci numbers as a suffix:

        <div><img src="images/rabbit-17711.jpg" /><a href="#">Petal</a></div>
        <div><img src="images/rabbit-75025.jpg" /><a href="#">Harley</a></div>
        <div><img src="images/rabbit-34.jpg" /><a href="#">Rosie</a></div>
        <div><img src="images/rabbit-987.jpg" /><a href="#">Petunia</a></div>
        <div><img src="images/rabbit-8.jpg" /><a href="#">Mortimer</a></div>
        <div><img src="images/rabbit-1.jpg" /><a href="#">Henry</a></div>
        <div><img src="images/rabbit-144.jpg" /><a href="#">Miffy</a></div>
        <div><img src="images/rabbit-2584.jpg" /><a href="#">E.B.</a></div>
        <div><img src="images/rabbit-89.jpg" /><a href="#">Baxter</a></div>
        <div><img src="images/rabbit-55.jpg" /><a href="#">Archie</a></div>
        <div><img src="images/rabbit-5.jpg" /><a href="#">Murphy</a></div>
        <div><img src="images/rabbit-317811.jpg" /><a href="#">Doc</a></div>
        <div><img src="images/rabbit-2.jpg" /><a href="#">Hopper</a></div>
        <div><img src="images/rabbit-6765.jpg" /><a href="#">Fluffy</a></div>
        <div><img src="images/rabbit-46368.jpg" /><a href="#">Daffodil</a></div>
        <div><img src="images/rabbit-28657.jpg" /><a href="#">Buttons</a></div>
        <div><img src="images/rabbit-233.jpg" /><a href="#">Freddie</a></div>
        <div><img src="images/rabbit-1597.jpg" /><a href="#">Roger</a></div>
        <div><img src="images/rabbit-514229.jpg" /><a href="#">Bucky</a></div>
        <div><img src="images/rabbit-4181.jpg" /><a href="#">Oliver</a></div>
        <div><img src="images/rabbit-13.jpg" /><a href="#">Olive</a></div>
        <div><img src="images/rabbit-3.jpg" /><a href="#">Bugs</a></div>
        <div><img src="images/rabbit-377.jpg" /><a href="#">Flower</a></div>
        <div><img src="images/rabbit-10946.jpg" /><a href="#">Chester</a></div>
        <div><img src="images/rabbit-610.jpg" /><a href="#">Bubbles</a></div>
        <div><img src="images/rabbit-121393.jpg" /><a href="#">Coco</a></div>
        <div><img src="images/rabbit-21.jpg" /><a href="#">Clover</a></div>

Stripping the unnecessary HTML stuff and ordering them by number we get:

1 
2 
3 
5 
8 
13 
21 
34 
55 
89 
144 
233 
377 
610 
987 
1597 
2584 
4181 
6765 
10946 
17711 
28657 
46368 
75025 
121393
317811
514229

Note that the 27th fibonacci number is missing, so that rabbit must be hiding something. We can simply visit images/rabbit-196418.jpg to get the flag: