John wishes to get into a club. He knows that the club requiers a code. He stands around the corner and listens to two people get past the bouncer.
The bouncer tells Bert to de-code six, Bert reply's with three and gets in.
The bouncer then tells Fred to de-code Twelve, Fred reply's with six and gets in.
Right now John is quite confident that he can get in, he walks to the bouncer and is told to de-code ten. John happily replys with five but is not let in.
What is the number he should have said to get in and how do you de-code it?
3.
You de-code the numbers by telling the bouncer the sum of all the letters. (other examples: four would be four, three would be five and fifty would be five)