Three Friends Puzzle Solution

In this puzzle we have to make sure that no person is in danger.

Let the names of the persons be A, B and C.

So they start from their starting point and after 1st day A give it's 2 days resource to B and C. So A has 1 day resource left with him which he can use to return back to the starting point. Now B and C starts again and they have a 4 day supply again because of the food and water given by A.

After the second day B gives his 1 day supply to C and keeps the remaining 2 days supply with him so that he can return safely to the starting point.

Now after 2nd day C again has 4 days supply so he can continue towards the destination point and will reach there safely.

So only 1 person can reach the destination safely.

Images:

A - 4 days                                                                                                                  A - 3 days
B - 4 days  ----------------------------------------------------------------------------------- B - 3 days
C - 4 days                                           after 1st day                                                  C - 3days

A gave its 2 days supply to B and C. So now

A - 1 day                                                                                                                                
B - 4 days  ---------------------------------------------------------------------------------- B - 3 days
C - 4 days                                           after 2nd day                                                 C - 3days

B gave it's 1 day supply to C and B returns back.
B - 2 days
C - 4 days

So C has 4 days resources and can cover the 4 remaining days.

Three Friends Puzzle

This puzzles is used to test the management capability of the student by the interviewers.

Three Friends starts on a trip to the Sahara Desert. It takes 6 days to reach the destination. Each person can carry only enough food and water for 4 days. So the maximum resource which a person can carry will last for 4 days.

There is no place in between the trip where they can refill their resources.

Without risking anyone's life they have to make as many people as possible to safely reach the destination. How many people can safely reach the destination.?

Click here for the solution

Daughters Age Puzzle Solution

Well this puzzles looks very vague the first time you listen to it. But if you understand each and every word of it you will figure out the solution.

Let's start with all the combinations possible as we know that the product of their ages is 72.

Ages                                                                                     Sum

1,1,72                                                                                   74
1,2,36                                                                                   39
1,3,24                                                                                   28
1,4,18                                                                                   23
1,6,12                                                                                   19
1,8,9                                                                                     18
2,2,18                                                                                   22
2,3,12                                                                                   17
2,4,9                                                                                     15
2,6,6                                                                                     14
3,3,8                                                                                     14
3,4,6                                                                                     13

After looking at the building number Scientist 1 is not able to figure out what are the ages of the daughters.
So if we look at the sample space shown above we will find that there are two cases. This means that the number on the building was 14 and the Scientist 1 is confused with 3,3,8 and 2,6,6 as options.

Since Scientist 2 says that the older daughter plays piano. This means that the 2,6,6 possibility is gone so the ages of the daughters are 3,3,8.

Everything is mentioned in the puzzles. Just you have to think and try to figure out the solution.

Daughters Age Puzzle

This Puzzle involves a bit of mathematics to figure out the correct solution.

Two Scientist met each other after twenty years.
Scientist 1: How are you?
Scientist 2: Great. I got marries and have 3 daughters now.
Scientist 1: That's really great. How old are they?
Scientist 2: Well the product of their ages is 72 and the sum of their ages is the number written on that building.
Scientist 1: ok I go it. Wait still i am not clear.
Scientist 2: Ohh sorry the oldest one has just started to play piano.
Scientist 1: Wonderful my oldest daughter is of the same age.

How old are the daughters and how does scientist 1 find this?

Click here for the Solution

Sand Timers Puzzle Solution

The solution is simple as you have to think in the right direction.

Start both the sand timers together. Once the 7 minutes are over sand in the 7 minute timer will be completed moved from one portion to the other. Reverse the 7 minutes timer and wait.

When the 11 minutes sand timer gets finished reverse the 7 minutes timer again and wait for it to finish transferring the sand from one portion to another. It will take 4 minutes and in total you can measure 15 minutes.

Mathematically

7 Minutes Sand Timer Finished.

Time Remaining in 11 minutes timer - 4 minutes

Reversing the 7 minutes timer - 4 minutes will elapse.

Once 11 minutes gets over reverse the 7 minutes timer again to use that 4 minutes

So total = 7+4+4 = 15 minutes.