Evolution

Our universe got created 13.7 billion years ago. Consider the following data point to get a sense of how big our universe is. From Earth, light takes 1.29 seconds to reach Moon 8 minutes to reach Sun 322 minutes to reach Pluto 93 billion years to reach the edge of Universe Where did everything come…

Working Backwards

I came across an interesting problem in the book How to Solve It by G.Polya. How can you bring up from the river exactly six quarts of water when you have only two containers, a four quart pail and a nine quart pail, to measure with? Given below are the containers. Notice that they are not…

Newton’s laws of motion

People originally discovered physics and other sciences by asking how and why questions. Recently I read the book How Everything Works by Louis A. Bloomfield. This book teaches physics by answering the how and why questions on everyday objects that we see and use. In this post I will be explaining about Newton’s three laws of motion.…

Be A Cloner

There are 50,000+ publicly traded businesses globally. Even a 10 person investment team can only evaluate a few hundred public companies every year. How does a retail investor like me identify great businesses from a very large dataset? Recently I watched the lecture given by Mohnish Pabrai at MDI. His solution to the problem is…

Graphs

Given below are 5 friends and how they are connected. If I ask you to find the shortest path for Peter to reach Tom then you will immediately answer that he should go through Sachin [Peter -> Sachin -> Tom]. It requires some effort if you want to make the computer answer the same question.…