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The Mystery of the Missing Money – A classical puzzle by Human Computer Shakuntala Devi With Solution
Two women were selling marbles in the market place — one at three for a Rupee and other at two for a Rupee. One day both of then were obliged to return home when each had thirty marbles unsold. They put together the two lots of marbles and handing them over to a friend asked her to sell then at five for 2 Rupees. According to their calculation, after all, 3 for one Rupee and 2 for one Rupee was exactly same as 5 for two Rupees.
Now they were expecting to get 25 Rupees for the marbles, (10 Rupees to first and 15 Rupees to second), as they would have got, if sold separately. But much to their surprise they got only 24 Rupees ( ) times for the entire lot.
Now where did the one Rupee go? CAN YOU EXPLAIN THE MYSTERY?
There isn’t really any mystery, because the explanation is simple. While the two ways of selling are only identical, when the number of marbles role at three for a Rupee and two for a Rupee is in the proportion of three by two. Therefore, if the first woman had handed over 36 marbles and the second woman 24, they would have fetched 24 Rupee, immaterial of, whether they sold separately or at five for 2 Rupee. But if they had the same number of marbles which led to loss of 1 Rupee when role together, in every 60 marbles. So, if they had 60 each, there would be a loss of 2 Rupee and if there were 90 each (180 altogether) they would lose 3 Rupees and so on.
In the case of 60, the missing 1 Rupee arises from the fact that the 3 marbles per Rupee woman gains 2 Rupees and the 2 marbles per Rupee woman loses 3 Rupees.
The first woman recieves 9½ Rupees and the second woman 14½ , so that each loses ½ Rupees in the transaction.
The much talked about Cloud Computing promises to change the way Information Technology People look at delivering IT and the way business people perceive it. This one is now a general and important part of IT.
What is “Cloud” & Why it is Connected to Computing?
The name cloud computing was inspired by the cloud symbol that’s often used to represent the Internet in flow charts and diagrams. Cloud Computing is a general term for anything that involves delivering hosted services over the Internet.
Services? What Services?
The services are broadly devided into three catagories:
• Infrastructure-as-a-Service (IaaS):
This involves Plateforms like Remote Server or Database or Remote Desktop.
SaaS is most important service. It is an application hosted on a remote server and accessed through the Internet. A simple and concrete example of SaaS are the free email systems offered on the internet such as Hotmail, GMail, Yahoo Mail etc. Each program meets the basic criteria of an SaaS application:
•vendor hosts (Microsoft, Google, Yahoo) all of the programs, logic and data in a central location and provides end users access to this data and the software which is run and used over the world-wide-web (WWW).
Profits of Cloud Computing
A cloud service has three distinct characterstics that differentiate it from the traditional hosting.
• It is sold on demand, typically by the minute or the hour.
• It is elastic – a user can have as much or as little of a service as they want at any given time.
• The Service is fully managed by the provides and the consumer offer nothing but a personal computer or a mobile and Internet access.