Euler would never
have an ordinary pet such as a cat, a dog or a Guinean pig… Instead, he has a 5-feet
Bear, which requires 60% of what he earns in food. Due to the
current financial breakdown in Matfor, Euler couldn’t feed properly his beloved
bear and he escaped looking for something to eat. These are the directions the
bear took 1)First he headed
300km South 2)Then, he went
400km to the East 3)Finally, when he
realised that he really missed his owner Euler, he run North and he got home The question may seem
strange, but it is not…Which is the colour of Euler’s pet?

Note: the colour may
not be any those depicted in the drawing. Dedline: Sunday, 25th of May Printable version available here. The video below shows 10 outstanding visual effects which have been created without any CGI (Computer Generated Images), they are old-fashion-style but impresive :D What do you prefer? CGI or practical effects?

PS: Dragneel and Cesar Romero got 30 coins and V-Lo 60 coins solving last challenge.

The evil Lords of
Matfor have created an Euler Piruleta Clone using a technique they learnt
thanks to compulsively playing two thousand hours to Tomb Raider I. Euler faces his
fake-himself for the first time while he is visiting a round square. Both
of them freak out and start running in
opposite directions at the same speed. Every time they
meet, they freak out, and run changing the directions with one little
difference: after every future encounter
one of them will change his speed to half of his previous speed. They change their speeds alternatively (let’s say that Euler is the first who changes his
speed. Then after they meet, FakEuler changes the speed, after the next
meeting, Euler changes his speed once again, and then FakEuler… this goes on
forever and ever…)

How many times do
they have to meet before they face themselves once again at the start position? Deadline: Monday, 28th of April Printableversion available

Every correct answer will be awarded with 30 coins if only the answer is given and with 30 extra coins (making a total of 60) if a thorough explanation is featured.

Lara Croft Versus Doppleganger

PS: IBatman, V-Lo, Cesar Romero and The Headhunter have been awarded with 40 coins for solivng our last challenge!

Our beloved hero
has been mysteriously teleported into a bizarre labyrinth. It seems the
responsible for this is Jareth the Goblin King, who was bored stiff and decided
to put Euler into this trial.

Help Euler to get
to the teleport pod to leave this nerve-wracking maze! Tips:

-Print the labyrinth’s map and fold it as if it were a cylinder.

-This way you will have the chance of continuing your
path.

-Draw the path which leads into the pod on the paper.

-Hand in your solution with your name written on the
back side.

This challenge is based on the famous 1986 Jim Henson's film "Labyrinth". Jim Henson is also responsible for the creation of "The Muppets". Althouth it is a film mainly aimed to children, it is indeed a classic and I therefore recommend you to give it a try ;) (you will even find some interesing logic challenges in it)

Furthermore, Labyrinth's main actor is David Bowie!! (who also wrote and performed the featured songs)

"Underground" - David Bowie (aka Jareth the Goblin King)

PS: IBatman, V-Lo, Cesar Romero and Stark have won 40 coins each thanks to their solution of the 2€ challenge :D

Euler Piruleta
was once a rascal and he didn’t manage to obtain his ESO degree. Now he has
been threatened that he will be expelled of Matfor if he doesn’t pass the only
exam he failed that time: Similarity and Trigonometry!

Since this is now
your area of expertise, can you help Euler to solve this problem?

How far do we
have to place a 2€ coin from our
eye to completely cover the Moon? The information
below is everything you will need to solve it:

-Moon’s Diameter: 3476 Km

-Distance Moon-Earth: 384.000 Km

-Coin’s Diameter: 28 mm

Tip: you know how this works… draw the situation
described and you will be able to solve the problem! :D

You will get 20 coins if you send the right answer and 20 extra coins if you explain how you got the code!

PS: Cesar Romero and TaniaPopcorn have received 40 coins and TheHeadhunter 20 for the solution of the previous challenge! This is a song I've been particularly enjoying these days...

Euler Piruleta
feels exhausted after those past two ordeals he went through (the zombies and
all that stuff). Luckily enough for him, he had a great Christmas time with his
family (some strange fellows though). His grandfather
knows he keeps risking his life to help the people of Maftor, so he decided to
give him his invisibility cloak he once had stolen from Harry Potter.

Everything seems
quite straightforward so far, but Euler’s grandfather is some sort of a joker
and thus he set a lock in the magic box. Euler must get the code to open it if
he wants to retrieve the invisibility cloak trapped inside!

The code is
formed by the 10 numbers which
should be written in the sentence below in such way that it makes sense
(including the numbers written in the gaps!)

In this sentence the number of times the 0 appears is ___ , the 1 is ___ , the 2 is ___ , the 3 is ___ , the 4 is ___ , the 5 is ___ , the 6 is ___ ,

the 7 is ___ , the 8 is ___ and the 9 is ___ .

That is, you have
to complete those 10 gaps using numbers from 0 to 9 (which can be repeated) to
get a coherent sentence. For example, if you use only the number 1:

In this sentence the number of times the 0 appears is 1 ,

the 1 is 9 , the 2 is 1 , the 3 is 1 , the 4 is 1 , the 5 is 1 ,

the 6 is 1 , the 7 is 1 , the 8 is 1 and the 9 is 1 .

It would be wrong
because you can find 2 numbers 9
in the sentence and not 1!!

Help poor Euler
to get his invisibility cloak!!

You will get 20 coins if you send the right answer and 20 extra coins if you explain how you got the code!

PS: Jorge Stark, Cesar Romero, Popcorn and Headhunter have received 40 extra coins thanks to the last challenge!

Palanquilla's Song: You probably don't know who Leonard Cohen is and I guess you will not like his music (but you will in the forseeable future, trust me). Anyway, if you play this song and wait to the position 04:26 you'll hear Palanquilla's fake laughter.