## 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 bulbs have their corresponding switches (exactly three) inside the room. You can turn the switches on and off and leave them in any position. How would you identify which switch corresponds to which electric bulb, if you are allowed to go outside and come inside the room only once? This is a logic puzzle, which was asked to me by a friend…

## When nothing is everything in Set theory

In an earlier post, I discussed the basic and most important aspects of Set theory, Functions and Real Number System. In the same, there was a significant discussion about the union and intersection of sets. Restating the facts again, given a collection $\mathcal{A}$ of sets, the union of the elements of $\mathcal{A}$ is defined by $\displaystyle{\bigcup_{A \in \mathcal{A}}} A := {x : x \in A \textrm{ for at least one } A \in \mathcal{A} }$ . The…

## Why You Need To Take A Level Courses?

Have you ever wondered why you need to take A level courses? This question has been asked plenty of times. A level courses offer several benefits to students over those that only have O-level education. Understanding these benefits is the only way to persuade more people to further their education when they may be so reluctant to do so. A-Level Courses Advance Your Education Many people may feel quite fed up by the time they are through with their…