Puzzle: 50 coins
With your eyes closed, somebody puts 50 coins on the table: 40 heads and 10 tails. Let's assume that you cannot tell the side of the coin from touching or any other mechanism. Your job is to divide up the coins in two groups. All the 50 coins must be in one of the two groups, but the number of coins in each group may be different. Your aim is to have the same number of tails in each group. What do you do?
posted by Reza at 7:47 PM
4 Comments:
If you can turn the coins over - this one was easy
Just divide the coins into a group of 10 (G10) and a group of 40(G40). Let us assume that G40 has x tails, therefore G10 has 10-x tails and therefore x heads.
Just flip over each of the coins in G10 and it will now have x tails and 10-x heads.
I am wondering if there is a solution without flipping coins over.
Abhi must have a more mathematically inclined brain than I :)
I think arrived at the same solution as him, but with a different methodolgy.
I paired the ratio down (2 tails, 8 heads) and put 10 quarters on the table in front me.
Pile one contains 2 coins, pile two contains 8. As long as you flip all the coins in pile one, you will have the same number of tails in both groups (whatever the equivalent ratio).
what s the solution?
warhammer gold warhammer money warhammer accounts tibia money tibia gold tibia item runescape accounts buy runescape accounts runescape money runescape gold runescape gp runescape power leveling runescape powerleveling cheap rs2 powerleveling runescape equipment buy rs equipment runescape runes cheap rs2 runes runescape logs cheap rs2 logs runescape items buy runescape items runescape quest point rs2 quest point cheap runescape questpoint runescape gold runescape items runescape power leveling runescape money runescape gold buy runescape gold buy runescape money runescape items runescape accounts runescape gp runescape accounts runescape money runescape power leveling runescape powerleveling tibia gold dofus kamas buy dofus kamas wow power leveling wow powerleveling runescape questpoint rs2 questpoint Warcraft PowerLeveling Warcraft Power Leveling World of Warcraft PowerLeveling World of Warcraft Power Leveling Hellgate money Hellgate gold buy runescape logs buy rs2 items cheap runescape items Hellgate London gold Guild Wars Gold buy Guild Wars Gold runescape items rs2 accounts cheap rs2 equipments lotro gold buy lotro gold buy runescape money buy runescape gold buy runescape runes lotro gold buy lotro gold runescape money runescape gold cheap rs2 powerleveling eve isk eve online isk buy runescape power leveling rs2 power leveling tibia gold tibia item runescape accounts Fiesta Silver Fiesta Gold Scions of Fate Gold Hellgate Palladium Hellgate London Palladium SOF Gold Age Of Conan Gold AOC Gold ArchLord gold tibia money tibia gold runescape accounts runescape gold cheap rs2 powerleveling buy ArchLord gold DDO Plat Dungeons and Dragons Online Plat
Post a Comment
<< Home