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Q.1 Measure water
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If you have 3 gallon and 5 gallon measurement jugs then how would you measure 4 gallon water. Assume you have enough water supply.
Answer:
1. Fill 3 gallon jug first and pour it into 5 gallon jug.
2. Fill 3 gallon jug again and pour it into 5 gallon jug till its full. Now you have 1 gallon left in 3 gallon jug.
3. Empty 5 gallon jug and pour 1 gallon from 3 gallon jug. Now you have 4 gallon empty space in 5 gallon jug and you can use it to measure 4 gallon.
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Listen to the answer to this puzzle at http://www.listenvoice.com/listenVoiceNote.aspx?id=101
Q.2 Balance puzzle
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will add
Q.3 Three chains
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Q.4 2) You have 5 jars of pills. Each pill weighs 10 gram, except for contaminated pills contained in one jar, where each pill weighs 9 gm. Given a scale, how could you tell which jar had the contaminated pills in just one measurement?
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1. Mark the jars with numbers 1, 2, 3, 4, and 5. 2. Take 1 pill from jar 1, take 2 pills from jar 2, take 3 pills from jar 3, take 4 pills from jar 4 and take 5 pills from jar 5. 3. Put all of them on the scale at once and take the measurement. 4. Now, subtract the measurement from 150 ( 1*10 + 2*10 + 3*10 + 4*10 + 5*10) 5. The result will give you the jar number which has contaminated pill
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