Permutations of divisible integers
Problem Statement: How many integers between 100 and 999, inclusive have the property that some permutation of its digits is a multiple...
Possible paths in a nxn grid
Problem Statement: You are standing on the point A in a city where roads are represented as lines and each corner is a stop. You need to...
Factorial and why 0! = 1.
We all are familiar with factorials and their implications in combinatorics, algebra and mathematical analysis and we all have seen this...
43,252,003,274,489,856,000 combinations of a 3x3 rubik's cube...
We all are familiar with rubik's cube. It is one of the most famous puzzle and there are a lot of competitions held every year in which...