The Problem with The Sports

We move from the peaks of the Pyrenees to the Valley… In 6 months some of you will face some of your worst fears in the Green Week (heights, rafting, arborism, rappelling…) Let’s see if you manage to survive those hazardous situations!

If we analyze what happened last year, I was in charge of 30 kids…

- 16 of them did the Rafting Activity, 14 of them the Rappelling activity and 13 of them the arborism activity.

- 6 people did the Rafting and Rappelling activities, 6 people took part in the Rafting and Arborism activities and 5 people enrolled in the Rappelling and Arbosim activities.

- Only 3 people had enough courage to do the three activities.

Well… of course there is no doubt that I did them all!



The question is… how many of those 30 kids didn’t take part in any activity?



Extra Question: who is hiding behind the mask?


Printable Version available.

Deadline: October the 4th



Have a nice weekend! The song below is a 1996-classic hit!!

No Doubt - "Don't Speak"

PS: Olalla, Juan and Mónica sent me the right answer. Congratulations!

The Problem with the Pills

Last year’s white week was a great experience, but Elena and I needed some help to cope with all your daily crazy stuff… That’s why the doctor prescribed us some pills to both avoiding getting nervous (Pills Type A, blue bottle) and preventing us from feeling dizzy during the day (Pills Type B, green bottle). We had 6 pills of each type (one for each day) and all of them looked and tasted exactly the same.

The problem is that on the first day I dropped them accidentally and two B-pills and one A-pill fell from the bottles… and I couldn’t tell which of those three pills were the two B-pills and which was the A-pill!

I was terrified because the doctor had told me that if by any chance I would take by mistake 2 pills of the same type, I’d go crazy-bananas and all your grades could be changed to zero without even noticing… what a disaster!

Anyway, that didn't happen...

So... how did I manage to take the proper dose every day? (one type-A pill and one Type-B pill)

Deadline: Thursday the 27th of September

Hand in your solution: you can either send your solution by e-mail or hand in a handwritten copy next week.

There is available a printable version.

Have a nice weekend! 

This song is from one of the first CD's (there was a time when people used to buy CD's, cassettes, vinyls...) I have ever bought in my life (I was 13 years old). 

The Offspring - "All I want"

Frikimaths, Take 2

Frikimahts welcomes you!

This blog has been recently redesigned for its new crew. It will walk along you throughout this whole Bilingual Maths new experience which is supposed to last for the next two years.

Are you ready to start??

Arcade Fire - "Ready to Start"

Amost every Thursday a brand new Challenge of the Week will be uploaded. But not only maths or logic challenges are allowed, you should feel yourselves free to create any entry sharing something special to you, or just simply something freak you crave to show to the world.

Let’s start with some music… have you ever wondered how numbers may sound like?...

The music of Pi (3,1415926...)