Print String Permutations
How will you print all permutations of characters in a string?
Algorithms, Math Problems, String Manipulation
Math Problems
Mathematical problems involving probability, combinatorics, and number theory.
Dynamic Programming, Math Problems
Prime number problem
You need to a number of floors in a building. There are 68 floors (numbered 1 to 64). Conditions: 1.
Math Problems
Prime number problem
A man has to buy 7 floors in a building. Numbered floor 1 to 68. Conditions: 1. He cannot buy
Math Problems
Probability of a Car Passing By
The probability of a car passing a certain intersection in a 20 minute windows is 0.9. What is the probability
Arrays, Data Structures, Math Problems
Probability Distribution Function
Write code to generate all possible combinations of ‘r’ elements in a given array of size ‘n’?
Algorithms, Bit Manipulation, Brain Teasers, Logic Puzzles, Math Problems, Recursion
Sum it Up
Problem: you are given a sequence of numbers from 1 to n-1 with one of the numbers repeating only once.
Algorithms, Bit Manipulation, Brain Teasers, Logic Puzzles, Math Problems, System Design
Card Trick Without the Trick
This is a card trick without the trick. there is no sleight of hand, no tricks up my sleeve, no
Logic Puzzles, Math Problems
Monty Hall Problem
Another well known problem in probability is the Monty Hall problem. You are presented with three doors (door 1, door
Math Problems
Mountain Man
At 6 a.m. a man starts hiking a path up a mountain. he walks at a variable pace, resting occasionally,
Math Problems
Ants on a Triangle
There are three ants on a triangle, one at each corner. at a given moment in time, they all set
Algorithms, Math Problems, Recursion, String Manipulation
Cube
This is difficult to describe in words, so read this carefully, lest there be any confusion. You have a normal
Math Problems
Noodles
There is a pot of N noodles. (so there are 2N ends). A person randomly grabs two ends and merges
Algorithms, Logic Puzzles, Math Problems
Heaven
A person dies, and arrives at the gate to heaven. there are three doors. one of them leads to heaven.
Algorithms, Logic Puzzles, Math Problems
Coin Rolls
Every night, I dump all the change in my pocket into a big bucket. When I buy things, I never
Math Problems, Recursion
100 Factorial
how many trailing zeroes are there in 100! (100 factorial)? Solution One per factor of 10, and one per factor