Cube
3 min read This is difficult to describe in words, so read this carefully, lest there be any confusion. You have a normal […] Read article
Algorithms, Math Problems, Recursion, String Manipulation
Logic Puzzles
More Hat Puzzles
3 min read I buried four fishermen up to their necks in the sand on the beach at low tide for keeping their Read article
Logic Puzzles
Coin on a Table
2 min read You die and the devil says he’ll let you go to heaven if you beat him in a game. the Read article
Math Problems
Noodles
3 min read There is a pot of N noodles. (so there are 2N ends). A person randomly grabs two ends and merges Read article
Algorithms, Logic Puzzles, Math Problems
Heaven
2 min read A person dies, and arrives at the gate to heaven. there are three doors. one of them leads to heaven. Read article
Brain Teasers, Logic Puzzles
Flipping Coins
2 min read Someone walks into your room and dumps a huge bag of quarters all over the floor. They spread them out Read article
Logic Puzzles
Pennies
2 min read I challenge you to a game. we each get one penny and we flip them at the same time. (so Read article
Brain Teasers, Data Structures, Logic Puzzles, Microsoft Interview Questions
Linked List
2 min read How does one find a loop in a singly linked list in O(n) time using constant memory? You cannot modify Read article
Coding Interview Questions
Last Ball
3 min read You have 20 blue balls and 14 red balls in a bag. you put your hand in and remove 2 Read article
Algorithms, Logic Puzzles, Math Problems
Coin Rolls
4 min read Every night, I dump all the change in my pocket into a big bucket. When I buy things, I never Read article
Coding Interview Questions
Calendar Cubes
2 min read A man has two cubes on his desk. every day he arranges both cubes so that the front faces show Read article
Coding Interview Questions
Boys and Girls
2 min read In a country in which people only want boys, every family continues to have children until they have a boy. Read article
Brain Teasers, Logic Puzzles
Painfully Easy
2 min read I flip a penny and a dime and hide the result from you. “one of the coins came up heads”, Read article
Coding Interview Questions
Nuggets
2 min read You can go to a fast food restaurant to buy chicken nuggets in 6-pack, 9-pack or 20-packs. is there such Read article
Coding Interview Questions
Orbs
2 min read You have two identical crystal orbs. you need to figure out how high an orb can fall from a 100 Read article