Chessboard
3 min read problem: using 31 dominoes, where one domino covers exactly two squares, can you cover all the empty squares on this […] Read article
Arrays, Brain Teasers
Logic Puzzles
Easy River Crossing
3 min read Three cannibals and three anthropologists have to cross a river. the boat they have is only big enough for two Read article
Algorithms
Shapes
3 min read Part I: draw a square. divide it into four identical squares. remove the bottom left hand square. now divide the Read article
Algorithms, Arrays, Dynamic Programming, Google Interview Questions, System Design
Webloggers
4 min read Five webloggers – joshua Allen, meg Hourihan, jason Kottke, robert Scoble, and joel Spolsky – were competing for karma points Read article
Bit Manipulation, Logic Puzzles
Hard River Crossing
3 min read a disfunctional family has to cross the river. on one side of the river are a mom and 2 daughters, Read article
Data Structures, Logic Puzzles, String Manipulation
Classic Weighing
7 min read this is a classic problem which i have heard many times before. this is the “harder” of the two problems, Read article
Logic Puzzles, Math Problems
Monty Hall Problem
4 min read Another well known problem in probability is the Monty Hall problem. You are presented with three doors (door 1, door Read article
String Manipulation
Gold Chain
2 min read A man has a gold chain with 7 links. he needs the service of a laborer for 7 days at Read article
Algorithms
Surgeons
2 min read A one armed surgeon with a hand wound needs to operate on three patients. the surgeon only has two gloves. Read article
Bit Manipulation, Brain Teasers
Clock
2 min read Part I: what is the angle between the minute hand and the hour hand at 3:15 on an analog clock? Read article
Math Problems
Mountain Man
1 min read At 6 a.m. a man starts hiking a path up a mountain. he walks at a variable pace, resting occasionally, Read article
Algorithms, Bit Manipulation, Brain Teasers, Data Structures, System Design
Treasure Island
4 min read You find an old treasure map in your grandma’s attic. the map shows a cannon, a coconut tree, and a Read article
Logic Puzzles
Screwy Pirates
3 min read A. first i would just like to say i am so glad jenna got voted off survivor. yuck, i couldn’t Read article
Math Problems
Ants on a Triangle
2 min read There are three ants on a triangle, one at each corner. at a given moment in time, they all set Read article
Brain Teasers
One Mile South
3 min read How many places are there on the earth that one could walk one mile south, then one mile east, then Read article