The Train Cars and the Bridge Crossing
A train comes to a bridge that can carry a maximum weight limit of 12 tons. The engine of the train weighs 1 ton, and the four cars that the train is hauling weigh 11 tons, 7 tons, 5 tons, and 2 tons. The heavier the load the slower the train is able to travel. It takes the engine one minute to cross he bridge for every ton of weight that it is pulling, including itself. ( For example, if the one ton engine were hauling an 8 ton car, it would take 9 minutes to cross the bridge.) What is the least amount of time required for the entire tain to cross the bridge? Assume that it doesn’t take any time to hook and unhook the cars at both ends and that there is a switching station at both ends to move the cars around in any order.
I will post the solution to this riddle on Wednesday August, 25, 2010. Good Luck!!
August 23, 2010
Posted by jw39 |
Brain Teasers, Family, Games, Informational, Puzzles, Riddles, Updates | 2010, brain teaser, Family, fun, life, locomotives, logic, logic puzzle, math, personal growth, puzzle, quiz, riddle, trains, update |
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Bobby Braingle has accidentally knocked over his inbox and his outbox. Eight pieces of paper have fallen to the floor, each with a single word printed on it. Can you figure out which of the following words belong in Bobby’s inbox and which belong in his outbox?
JURY,LINE,BACK,TENT,BURST,VOICE,TENSE,CRY
This puzzle is rated as a medium difficulty. I’m going to post the solution tomorrow, so make sure you check back. Good Luck!!
June 1, 2010
Posted by jw39 |
Brain Teasers, Family, Games, Informational, Puzzles, Riddles, Updates | 2010, brain teaser, Family, fun, life, logic, personal growth, puzzle, reasoning, riddle, update, word play |
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