jueves, 27 de febrero de 2014

Khan Academy: Operaciones con fracciones

Esta es la lista de los ejercicios sobre el tema 8 de operaciones con fracciones que tenéis que hacer en Khan Academy:

domingo, 23 de febrero de 2014

So you guys want to know where I was born III

Ok, so it took me a little longer than usual, there were some technical issues in the way, but click on the image for the next clue:

PS: If you have any problems with Java, write a comment and I'll try to help you.

sábado, 22 de febrero de 2014

Khan Academy: Las fracciones

Esta es la lista de los ejercicios sobre el tema 7 de introducción a las fracciones que tenéis que hacer en Khan Academy:

viernes, 31 de enero de 2014

So you guys want to know where I was born II

Seems the previous clue was no challenge for you guys, so let's see if I can make this one a bit more interesting. You're going to work a little bit of math to get this one. The next clue is ciphered and I've used a simple substitution cipher, based on a number (called the key), to write it.

So you understand what this means, here is an example: suppose you know the key to your cipher is 4, then you would substitute the letter A by the fourth letter in the alphabet, D, the letter B by the fifth letter, E, the C by the sixth letter, F, and so on and so forth. So, instead of HELLO, you would write KHOOR. If it helps, you can tell me how you would write GOODBYE in this cipher in a comment, and I'll tell you whether it's fine.

Now, for the actual clue: GUR PBHAGEL JURER V JNF OBEA VF N ERCHOYVP. And to get the key to the cipher: multiple the amount of divisors the number 120 has by the tenth smallest prime number, now add the digits of the result and use that as your key.

Good luck, hopefully you'll get it as fast as the previous one.

lunes, 27 de enero de 2014

Khan Academy: Los números decimales

Esta es la lista de los ejercicios sobre números decimales que tenéis que hacer en Khan Academy: