In the year 240747665835497936670841504392312550131533789094302176923021923 0892355006879909214795402102204224, as cosmopolitanism is in the air and companies are more than ever bound to a fair management of human and inhuman resources, the truth is still sometimes tough for some people. Take...

It was a bright and sunny day during April- May(can say, peak of summer) in a country in the northern hemisphere, near to the equator. I was wandering(on foot) through this country's vast and open land - harsh desert - and in the evening seen a strange thing - the sun was setting in the East - ...

Some time ago, I discovered that planet earth's sidereal rotation period equals 23 hours, 56 minutes, and 4.1 seconds (see for example this Wikipedia article). The sidereal rotation is the rotation of a celestial object around its axis. Thus, earth takes a little less than 24 hours to rotate arou...

I am learning to solve a 3x3x3 rubiks cube and the concepts behind the algorithms. I learnt a few things about the comutator . I am trying to form an algorithm to swap any two corner pieces i.e. at the end of the sequence two corners will be interchanged leaving all the other pieces undisturbed ...

Well, my friend told me that he's just visited a safari. Being toured around, he was very surprised how the guide could spot those animals so quickly. He took some pictures of the animals, anticipating to show them to me. However, when he gave me the photos, the photos are nothing like animals!...

There is a very well-known family of right triangles in Mathematics called "The Imperial triangles". Let me explain you how they are defined: We say $T_n$ is the $n$-th Imperial triangle if these two conditions are met: Its hypothenuse has length $\frac{1}{n}$ Water boils at the second-to-long...

Following the last question " What is the corner house number?" here is possibly a more challenging version. Fill in the missing house numbers on the map shown below. The area is occupied by math and language loving (crazy) residents who have come with the interesting names. There are 4 stre...

Inspired by A double-agent with a conundrum. Everything is hypothetical and while the choice of countries are important, they serve no political purpose. Tension between the US and China is rising. You are a senior officer working for the CIA, in charge of protecting secret technology from the h...

It's White to move and draw the game. What must White do? You must provide proof for your claim of what's to be done by any reasonable means. This puzzle was created by Nikita M. Plaksin, and published in Shakhmaty v SSSR in 1980. No looking up the solution please!

Each answer to a clue will consist of the titles of two works or series put together, where the last word of the first title matches the first word of the second title. Note that the word match does not have to be exact; for example, the last word of the first title might be a plural version of ...

This puzzle is a combination between a Slitherlink and a Fillomino. You should put a number in each square and draw a single closed loop over the grid such that the following properties are satisfied: All the shaded squares should contain 1, 2 or 3, and the number should equal the number of si...

I planning a surprise trip for my husband's 40th. He is a math geek. I am not. My plan is to tell him in a series of riddles/puzzles that he needs to figure out. We are going to LA to see his favourite singer. Anyway we are going Oct 25/6 (haven't 100% settled on the date) to Oct 30, 2019. So...