Introduction Pareidolia: From Ancient Greek; παρα ‎(para, “concurrent, alongside”) + εἴδωλον ‎(eídōlon, “image”). The tendency to interpret a vague stimulus as something known to the observer, such as interpreting marks on Mars as canals, seeing shapes in clouds, or hearing hidden messages in mu...

Write a function or program that outputs the number of each type of element (vertex, edge, face, etc.) of an N-dimensional hypercube. As an example, the 3 dimensional cube has 1 cell (i.e. 1 3-dimensional cube), 6 faces (i.e. 6 2-dimensional cubes), 12 edges (i.e. 12 2-dimensional cubes) and 8 v...

Recently, there's been a strong push against popularity-contest challenges. This post sums up the general feelings of the community pretty well, in my opinion. Even when challenge authors do everything right (like with Patch the Image), the challenges still attract close votes. The issue is begin...

Introduction A known fact is that Jon Skeet can code Perl and make it look like Java. In this challenge you will try to do something similar. Challenge Write a piece of code of any length that can be executed without any errors/exceptions in two different languages. Your program can take input...

Consider two displacements, one of magnitude 6 m and another of magnitude 8 m. What angle between the directions of this two displacements give a resultant displacement of magnitude (a) 14 m, (b) 2 m, and (c) 10 m.