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How can you divide 300 grams of powder medicine into 3 groups ?

+1 vote

The pharmacy has an old scale which has only two measuring weights 30 grams and 5 grams.
How can you divide 300 grams of powder medicine into 3 groups, one 150 grams, one 100 and the other 50 grams. You can only weigh 3 times.

posted Aug 13, 2014 by Kuldeep Apte

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1 Solution

+1 vote

first time
Weight 25 grams power with the help of 30 and 5 grams.
Left side put 30 gram weight and right side put 5 gram weight + 25 gm Power-----1 times weight---Put it in the bag
In the Second time Put the 25 gm powder in the left side with 30 gm weight.and do not touch 5 gm weight from right side. So now u will be able to weight 50 gm Power.---Put it in the second bag.---2nd times
In the third time Put the 50 gm also in the left side with out touching the other weights.--Now u could measure 100 gm.--3rd times
the rest of the power will be 125 gm as the total quantity is 300 gm. Open the 25 gm bag in it so that u will have 3 packet
50 + 100 +150

solution Aug 14, 2014 by Double S

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