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viler Regular user Norway 186 Posts |
Hi,
You got ten pill boxes, each containing 100 pills. Nine of the boxes contains real medicine, the 10th contains an illegal drug. The boxes and its contents looks, feels and smells the same. The only difference is that the whole contents in the box with illegal drugs weighs 1 gram (or 1 oz) more than the others boxes. You get only one weighing to find out which pill box contains the illegal drugs. V. |
Scott Cram Inner circle 2678 Posts |
I can do it in 0 weighings – you just said the 10th box contains the illegal drug!
Seriously, this is a classic. Just take 1 pill from box 1, 2 pills from box 2, and so on, up to 10 pills from box 10. If all of the boxes were the legal drug, you would expect the total weight to be the same as 55 pills. However, there will be a difference, due to the increased weight of the illegal drug. If it's 1 oz/gram heavier, it's box 1. If it's 2 oz/grams heavier, it's box 2, and so on. |
Nir Dahan Inner circle Munich, Germany 1390 Posts |
Seems like no one is really reading the threads, but just posts ...
This exact puzzle is being discussed 2 threads down and, in the other thread, I already commented that there exists other (more interesting) variants. http://www.themagiccafe.com/forums/viewt......um=101&4 http://www.themagiccafe.com/forums/viewt......um=101&4 ND |
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