Problem solving archive

How to solve similar problems in a few seconds, Profit and loss problem 2, Domain modeling

thumb_How to solve in a few seconds profit and loss problem 2, Domain modeling

A man sells two wrist watches one at a profit of 50% and another at a loss of 50%, but each at a same selling price of Rs.300. The net profit or loss is...This type of problem can be solved in a few seconds if you can form its Domain model by Abstraction and Repeated solving of similar problems with controlled variation...

Principle of disproportion saved the young adventurers

thumb_Principle of disproportion saved the adventurers

We expect all things around us to be in proportion. The room where we sleep should not be too high or too low for maintaining our sleeping comfort. The road we walk on should be of same level all the way. These comfortable ranges are in proportion to our human body size and all normal human movement aspects...