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measurment puzzle

rehans oberoi
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Joined: Dec 06, 2005
Posts: 174
You have 4 jars of pills. Each pill is a certain weight, except for contaminated pills contained in one jar, where each pill is weight + 1. How could you tell which jar had the contaminated pills in just one measurement?
Stefan Wagner
Ranch Hand

Joined: Jun 02, 2003
Posts: 1923

Do all jars contain the same numbers of pills and how much?
We may select as many as we like?

The contaminated pills are red!


http://home.arcor.de/hirnstrom/bewerbung
Murali Mohan
Ranch Hand

Joined: Jan 09, 2006
Posts: 66
let the weight of each uncontaminated pill be 'x'
so weight of contaminated pill is 'x+1'

there are 4 jars ( say 1, 2 ,3 and 4)

now take 1 pill from jar 1
now take 2 pills from jar 2
now take 3 pills from jar 3
now take 4 pills from jar 4

weigh them all together.
now the weight will be 10x + n
where n is the jar number which contains the contaminated pills.

let me know if I am wrong.


Thanks,<br />Murali...
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: measurment puzzle
 
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