Some Puzzles
For answers just click on Ans below each question.
1) There is a man and doctor has advice him to take exactly one Pill A and exactly one Pill B every day, otherwise he will die. He has two jars full of pills, one for pill A and another for Pill B. He takes pills by dissolving them in water. One day He dissolved one Pill of type A and 2 pills of type B. Now, you need to help this man as he is suppose to take only one pill of type A and only one pill of type B. The pills are expensive so he can't throw the solution of 3 pills and make a new solution. You should help him in such a way that every pill is utilized.
Ans... Come up with the answer but not so sure about it.
---------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------
2) How many times in a day do the minute and hour hands of a clock overlap?
Ans: Its not 24....
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
3) There are Eight Balls. Seven of them are equal in weight and the eight one is lighter than the other 7 balls. You are given a weighing machine in which you can compare two objects like the ones used in grocery shops in India. Now you have to find the 8th ball i.e the lighter ball using this weighing machine with as minimum number of comparisons as possible. What are the number of weight comparisons you made in order to find the lighter ball.
ANS.. Its less than 7 :)
---------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------
4) There are 10 boxes and each box has 10 balls. The weight of balls in each box is same that is 10 grams. But one box has balls with different weight that is the weight of each ball is 9 grams. Now you have a weighing machine (which measures weight) and you have to find the box having balls of 9 grams by using weight machine only once.
Ans
----------------------------------------------------------------------------------
----------------------------------------------------------------------------------
5) You have a large number of 3 types of animals. One of them is a buffalo which gives 5 liter of milk everyday. One of them is a cow which gives 1 liter of milk everyday and the another one is goat which gives 1/4 liter of milk everyday. Now you have to make a group of 20 animals such that combined they produce 20 liter of milk everyday and the number of animals should also be 20 in the group. The group of animal is required to have animals of all three types.
4 comments:
One solution could be that the person put one pill of type a in the solution then halved the solution and take the half solution on one day and other half on another day.
Answer to second question is 22. There will be delay of around 5 min every time and 24*5=120 min will be reduced so it will cross only 22 times
Answer to the thid question is 2 .First put 3 balls on one side of weighing machine and then some other 3 balls on another side of weighing machine. Two cases can arise now.
Case-I both the sides are equal. In this case the required ball will be among the remaining 2 balls. Now weigh the remaining two balls and you will get the lighter ball.
Case-II one of the side of weighing machine is heavy than the other side. Take the 3 balls from lighter side and take any 2 balls from them. Weight this two balls now if their weight is same then the lighter ball is the third ball and if the weights are different then the ball with the less weight is the required ball.
The answer to fourth question can be that you arrange the box in some order. Now you take one ball from the first box, 2 balls from the second box , 3 balls from third box and continue this process till the 10th box. After that you have to just weigh all those 55 balls that you have collected from 10 boxes. Once you have weight those 55 balls you can tell which box has balls with 9gm weight. This will be done as follows:
If all balls are same then the weight of 55 balls should be 550gm but here all balls are not same so the weight of 55 balls will be less than 550gm. if the first box was the box with 9gm balls then the weight of those 55 balls will be 541gm so you can do simple math like
(550-total weight of 55 balls)/9 the result will be the box having 9gm balls
Post a Comment