08-26-2011, 01:01 PM
Student: There is something wrong with my calculator my father gave me! He said it is one of the best calculators ever made. But it doesn't work!
Teacher: What's the problem?
Student: Well... It has this big ENTER... I do not understand...
Teacher: Is it this one? (holding up a 15C)
Student: Naa. He has that one and he uses it every day! It is... wait... a... 42S
Teacher: :-)