Mr. Rapp's Chemistry Help Site
 Grades  Graphing Tips  Online 3-D Laboratory  Reference Desk  AP Chemistry Test  News from Science  Links  After School Help  Fun Stuff  Teachers' Lounge    E-mail Mr. Rapp Brain Teaser - Where did the dollar go? 3 guys go to rent a hotel room, the room is \$30, so they each pay \$10. Later that night the hotel guy finds out the room is only \$25 so he gives \$5 to the bell boy to split between the 3 guys. The bellboy did not know how to split \$5 in 3 ways so he kept \$2 for himself and gave \$1 to each guy so the guys only paid \$9 a piece right? So if the guys paid \$27 and the bellboy kept \$2,  where is the other dollar? The Answer The math is incorrect. If they had been charged \$27.00 for the room originally, they would have each given the man \$10.00, and each received \$1 change, making the math problem 9+9+9=27, and 27+3=30, the \$3 being the key. Instead, the way the problem reads, it is turned into 27+2=29, which is where the confusion lies. The problem should be \$25 (room rate) + \$2 (what the bellboy kept) = \$27, and \$27 + \$3 (the change the three guys received) = \$30.
 Last updated on Last updated on August 2, 2001 11:15 PM