## Light the bulb: An everyday logic puzzle

You are inside a room and there are exactly three electric bulbs outside of the room. The three…

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83 posts

- byGaurav Tiwari
- December 11, 2013

You are inside a room and there are exactly three electric bulbs outside of the room. The three…

- byGaurav Tiwari
- April 21, 2014

In an earlier post, I discussed the basic and most important aspects of Set theory, Functions and Real…

- byGaurav Tiwari
- December 13, 2016

Just discovered Barry Martin’s Hopalong Orbits Visualizer — an excellent abstract visualization, which is rendered in 3D using…

- byGaurav Tiwari
- May 7, 2018

Sequence of real numbers A sequence of real numbers (or a real sequence) is defined as a function…

- byGaurav Tiwari
- September 14, 2014

This mathematical fallacy is due to a simple assumption, that $ -1=\dfrac{-1}{1}=\dfrac{1}{-1}$ . Proceeding with $ \dfrac{-1}{1}=\dfrac{1}{-1}$ and…

- byGaurav Tiwari
- May 7, 2018

Sets In mathematics, Set is a well defined collection of distinct objects. The theory of Set as a…

- byGaurav Tiwari
- April 15, 2014

People really like to twist the numbers and digits bringing fun into life. For example, someone asks, “how…

- byGaurav Tiwari
- May 8, 2015

Here is an interesting mathematical puzzle alike problem involving the use of Egyptian fractions, whose solution sufficiently uses…

- byGaurav Tiwari
- December 17, 2016

Last year, I managed to successfully finish Metric Spaces, Basic Topology and other Analysis topics. Starting from the…

- byGaurav Tiwari
- March 14, 2014

Holi, the festival of colors, was celebrated this year on 27th and 28th of March all over India.…

- byGaurav Tiwari
- January 21, 2014

The greatest number theorist in mathematical universe, Leonhard Euler had discovered some formulas and relations in number theory,…

- byGaurav Tiwari
- October 1, 2014

“Irrational numbers are those real numbers which are not rational numbers!” Def.1: Rational Number A rational number is…

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