Puzzle Solutions


Merchant and his Gold Coin (Puzzle - 1)

Cut the Gold Coin in to three parts
First part has 4/7 of total Gold Coin
Second part has 2/7 of total Gold Coin
Third part  has 1/7 of total Gold Coin

First Day:

Merchant has to give 1/7 part of the Gold coin to servant

Second Day:

Merchant has to give 2/7 part of the Gold coin to servant and take back the 1/7 part of the Gold coin from servant

Third Day:

Merchant has to give 1/7 part of the Gold coin to servant, Now Servant has 1/7 & 2/7 part of coins with him.

Fourth Day:

Merchant has to give 4/7 part of the Gold coin to servant and take back the 1/7  and 2/7 part of the Gold coin from servant

Fifth Day:

Merchant has to give 1/7 part of the Gold coin to servant, Now Servant has 1/7 & 4/7 part of coins with him.

Sixth Day:

Merchant has to give 2/7 part of the Gold coin to servant and take back the 1/7 part of the Gold coin from servant. Now Servant has 2/7 & 4/7 part of coins with him.

Seventh Day:

Merchant has to give 1/7 part of the Gold coin to servant. Now Servant has 1/7, 2/7 & 4/7 part of coins with him.

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Measure Time with Candles (Puzzle - 2)
Burn the First Candle completely that will measure a time of 10 minutes. Lit the second candle from both the ends as Candle takes 10 mins to burn completely from one side. When it is lighted from 2 different Ends, it will take 5 minutes to burn completely.


Hence a total time period of 15 mins can be calculated with both the candles (interesting right ??)

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Identify Odd Egg via Common Balance (Puzzle - 3)
Split the Eggs in to three groups A,B,C and each group having 3 eggs.
Take Group A, Group B and Weigh it on common balance
If Both are Equal (Weigh - 1)
     Take Group C, Pick any 2 eggs from these group and weigh it in common balance (Weigh - 2). If Both Eggs are equal in weight, then left over egg is under weight or Else If Common Balance the plate which moves upward has under weight egg

If Both are Not Equal (Weigh - 1)

      Take Group, that is lifting high on common balance and pick any 2 eggs from these group and weigh it in common balance (Weigh - 2). If Both Eggs are equal in weight, then left over egg is under weight or Else If Common Balance the plate which moves upward has under weight egg

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Identify Odd Marble via Electronic Balance (Puzzle - 4)
In a Container as there are 10 marbles. Pick each container and take distinct count of marbles as below
Container 1 ==> Pick Marble(s) 1
Container 2 ==> Pick Marble(s) 2
Container 3 ==> Pick Marble(s) 3
Container 4 ==> Pick Marble(s) 4
Container 5 ==> Pick Marble(s) 5
Container 6 ==> Pick Marble(s) 6
Container 7 ==> Pick Marble(s) 7
Container 8 ==> Pick Marble(s) 8
Container 9 ==> Pick Marble(s) 9
Container 10 ==> Pick Marble(s) 10

Now place the collected 55 Marbles on Electronic balance.
Let us assume the weight of each marble be 1 Grams. Expected Total weight of all marbles will be 55 Grams. Because of defectiveness, let us say container 5 has marbles which will weigh more by 0.1 Gram, so expected weight will come around 55.5 Grams as excess decimal point value will be the Container number in this case.

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People to cross River in a Boat (Puzzle - 5)
Please follow Step by Step process as defined below:
Initial stage Cop, Thief, Men, Daughters, Women, Sons are at River Bank - 1

  1. Pick up Cop-Thief pair and travel to River bank - 2
  2. Drop the Thief at River bank - 2 and cop only will reach back River bank - 1 
  3. Cop will Pick up Daughter - 1 at river bank -1 and travels to River Bank -2
  4. Cop will drop the daughter - 1 at river bank - 2 and picks thief along with him and reaches back to River bank - 1
  5. Both Cop and thief pair will drop at River bank -1
  6. Now Man along with his Daughter - 2 travels from River bank -1 to River Bank -2
  7. Man will drop his Daughter -2 at river bank - 2 and reaches back River Bank - 1 single
  8. Now Man will pick up Women at River bank -1 and reaches to River bank - 2
  9. Man will get down at river bank-2 and Women alone will return back to River bank - 1
  10. Women will get down at River bank -1 . Cop and Thief pair will travel from River bank - 1 to River bank - 2
  11. Cop and Thief will get down at River bank - 2. Man alone will travel back to River bank -1 
  12. Man picks up woman at River bank -1 and reaches back to River bank -2
  13. Man will get down at River bank - 2 and women alone will sail back to River bank -1
  14. Women will pick up her Son - 1 at River bank - 1 and travels back to River bank - 2
  15. Women along with her son - 1 will get down at River bank -2.
  16. Cop and Thief  pair will travel from River bank - 2 back to River bank - 1
  17. Cop will drop Thief at River bank -1 and picks Son -2 and reaches River bank -2
  18. Cop will drop son-2 at river bank -2 and sails back to River bank -1 to pick up thief
  19. Both Cop an Thief pair will reach back River bank - 2 safely.
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3 Light Bulbs and its Switches (Puzzle - 6)
A person can identify two bulb(s) by making one bulb off and other bulb on. But, coming to three we need to think of an alternative.
          As in Puzzle it was mentioned as Incandescent bulb. If bulb is kept switched on for a while will get heated up. Hence our problem is solved
         First Switch 'ON' bulb for some time then Switch it off.
         Second Switch 'ON' bulb and go to store room directly.
         Bulb that is heated up is connected to Switch - 1
         Bulb that is glowing continuously is connected to Switch - 2 
         Bulb that is not glowing is connected to Switch - 3

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Help Frogs to reach their Destination (Puzzle - 7)
Follow the below pattern to solve the puzzle :