Hey Guys, try this one for size,
Three Engr trainees in a hotel call room service and order one drink each. The delivery boy brings them up with a bill for exactly N30.00. Each guy gives him a N10.00 bill, and he leaves. That's fact!
When he hands the N30.00 to the cashier, he is told a mistake was made. The bill was only N25.00, not N30.00. The cashier gives the delivery boy five N1.00 bills and tells him to take it back to the 3 guys who ordered the drinks. That's fact! On the way back to their room, the delivery boy has a thought, These guys did not give him a tip. He figures that since there is no way to split N5.00 evenly three ways anyhow, he will keep two Naira for himself and give them back three Naira. OK! So far so good! He knocks on the door and one fellow answers. He explains about a mix up in the bill, and hands the guy the three Naira, then departs with his two-Naira tip in his pocket.
Now the fun begins! Remember N30-N25=N5 Right? N5-N3=N2 Right? So what's the problem? All is well, right? …………Not quite. Answer this: Each of the three guys originally gave N10.00 each. They each got back N1.00 in change. That means they paid N9.00 each, which times three is N27.00. The delivery boy kept $2.00 for a tip. N27.00 plus N2.00 equals N29.00. Where the heck is that other Naira? …………………………………………………Got the answer?
THE FIRST PERSON TO ANSWER THIS PUZZLE WILL WIN ONE FIVE ALIVE(LARGE), lol