Friday, 22 February 2013


AD01 8 BC01 8
AD02 9,2 BC02 5
AD03 6,8 BC03 7,6
AD04 6 BC04 6,9
AD05 7,5 BC05 8,9
AD06 6,2 BC06 5,1
AD07 7,8 BC07 6,1
AD08 5,3 BC08 5,1
AD09 7,7 BC09 9,8
AD10 5,9 BC10 9,2
AD11 4,2 BC11 6,4
AD12 6,9 BC12 4,7
AD13 8 BC13 5
AD14 9,6 BC14 8,9
AD15 5,2 BC15 9,5
AD16 6,5 BC16 7,1
AD17 5,1 BC17 7,2
AD18 5 BC18 3,8
AD19 9,7 BC19 4,2
AD20 7,4 BC20 7,1
AD21 3,5 BC21 5,2
AD22 8,3 BC22 9,5
AD23 7,3 BC23 4,1
BC24 5,5

Friday, 8 February 2013

Euler Piruleta Vs. Tartufo

Tartufo has many non-admirable qualities… he is not only a ruffian and a cheater, but also a words-twister and ruthless person. Even more, he uses his domain of cult language to seduce both naïve men and women to be his lovers. 

But don’t worry! Euler Piruleta has proven not to be a naïve person… pffiuuu! Anyway, Tartufo has used a Rajoy-Merkel software to hack into Euler Piruleta’s bank account and has stolen every single euro from it. He would only return the money if our hero manages to solve this simple-in-appearance problem.

A woman is 21 years elder than her son. In 6 years, the mother’s age will be five times his son’s.
Question: where is the woman’s boyfriend?

You have many algebra skills but Euler has none… help him to solve this tricky challenge! Don’t be daunted by the solution, it may seem wrong, but if you think carefully about its possible interpretation, you may be able to answer the question!


1)     Don’t forget that in 6 years, both the woman and the son will be 6 years older

2)     Remember that we are working with YEARS, so the solutions are expressed in YEARS. This means that you may have to interpret/translate one of the solutions to get the answer to the question… where is the women’s boyfriend?

As usual, send me your solutions by e-mail, and explain briefly how did you get to that result. Deadline: February the 17th. There's also a printable version.

As I promised, you can download now the solutions to the "Extra Exercises"!! 

Finally, these are some important dates for the next monts :D

- February the 20th: Units 4 & 5 review feat. Traveller's Problem

- February the 21st: Exam Units 4 & 5

- March the 4th: Progressions exercises (3ºAD)
- March the 5th: Gluing together triangles (3ºABCD)
- March the 6th: Progressions exercises (3ºABCD)
- March the 7th: Gluing together triangles (3ºABCD)
- March the 8th: Progressions exercises (3ºBC)

- March the 12th: Global Exam 2nd Dvaluation (Units 3, 4, 5)

- March the 13th: Futurama and Maths

- March the 26th: Exam Unit 7

- May the 9th: Exam Units 11 & 12

- May the 21st: Global Exam 3rd Evaluation (units 7, 11, 12 and 1 exercise of 13) This is this course's last exam ^_^

- There will NOT be written exam of units 13 and 10. You'll do a little Statistics Project at home (5 points) and some Geometry exercises in class (5 points). Those marks together will be considered as third evaluation's third partial exam. Therefore, from May the 21st till the end of the course you'll have enough time to prepare other subjects :D

Please, check if you have any problem with those dates ;)

PS: of course, there will be more surprises yet to be revealed :P MUAHAHA! Good ones, I mean...

AND ENJOY YOUR CARNIVAL HOLIDAYS!! This is one of the best songs I've heard in the last few months. They are from Iceland!!

Of Monsters and Men - "Little Talks"

PS: I haven't had enough time to check last challenge's solutions. I'll tell you whose are correct in the next entry ;)

Friday, 1 February 2013

Euler Piruleta Vs. Charlie's Chocolate Hell

Euler helper’s are decreasing in number and effort!! He is quite worried about that! What would happen to him without your help? Don’t procrastinate and try to help him this time... or the terrible Galician Non-Living may strike back!!

Evil Charlie has built a fortress with 20 rooms connected by the paths shown in the picture. Each path has a different brand of chocolates which will be poisoned if Euler doesn’t manage to solve this challenge. He must pass through every room only once using the paths shown in the picture. Not only he can’t use twice the same path, but he also has to finish in the same room he started….

-          You have to manage to pass through every room (point)
-          You can’t use the same path twice (although you don’t need to use all of them)
-          It is vital to finish in the same room you started.

You have until next Friday to solve this peculiar puzzle. Send in your solutions (which, of course, can be created using wonderful paint) or handwritten. As usual, there's a printable version!

Extra information!!
- Iñaki G, Carlos and Andrea are the only ones who sent the solutions and, therefore, they deserve an extra positive :D
- The solutions to the first set of exercises of the extra bulletin are already available!
- Remember you can mail me any doubt you might have when you try to solve them ;)
Linkin Park - Breaking the Habit

Linkin Park - Lost in the Echo

Linkin Park - Numb