A Man with Burning Ropes
A man has two ropes of varying thickness, those two ropes are not identical, they aren’t the same density nor […]
Brain Teasers
Brain Teasers
Sharpen your creative problem-solving with classic brain teasers and logic puzzles. These questions test lateral thinking, mathematical reasoning, and the ability to find elegant solutions to tricky problems.
Question Types:
Logic puzzles: River crossing, ball weighing, clock problems
Probability: Dice, cards, marbles, coin flips
Mathematical: Number sequences, geometry, combinatorics
Estimation: Fermi problems and approximations
Skills Developed:
Thinking outside the box
Breaking down complex scenarios
Finding elegant, non-obvious solutions
Communication and explanation
Interview Context: Common at Google, Palantir, and consulting firms. Tests problem-solving approach more than coding ability.
Brain Teasers, Data Structures
Building a Stack with a getMax() function
Suppose you had a Stack class. Write a new class MaxStack which, in addition to push() and pop(), has a
Algorithms, Arrays, Brain Teasers, Data Structures, String Manipulation
Reverse a String
A typical programming interview question is “reverse a string, in place”. if you understand pointers, the solution is simple. even
Brain Teasers, Logic Puzzles
100 Doors in a Row
Problem: you have 100 doors in a row that are all initially closed. you make 100 passes by the doors
Brain Teasers, Data Structures, Dynamic Programming, Logic Puzzles
Red Marbles, Blue Marbles
Problem: you have two jars, 50 red marbles, 50 blue marbles. you need to place all the marbles into the
Algorithms, Brain Teasers, Logic Puzzles
Bumblebee
problem: two trains enter a tunnel 200 miles long (yeah, its a big tunnel) travelling at 100 mph at the
Algorithms, Bit Manipulation, Brain Teasers, String Manipulation
int atoi( char* pStr )
Problem: write the definition for this function without using any built-in functions. if pStr is null, return 0. if pStr
Bit Manipulation, Brain Teasers, Logic Puzzles
Daughters’ Ages
Two MIT math grads bump into each other at Fairway on the upper west side. They haven’t seen each other
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.
Brain Teasers, Logic Puzzles
Pirates
Five pirates have 100 gold coins. they have to divide up the loot. in order of seniority (suppose pirate 5
Bit Manipulation, Brain Teasers, Logic Puzzles, String Manipulation, System Design
Fog Creek Programmers
100 fogcreek programmers are lined up in a row by an assassin. the assassin puts red and blue hats on them.
Bit Manipulation, Brain Teasers, Logic Puzzles
Bad King
A bad king has a cellar of 1000 bottles of delightful and very expensive wine. A neighbouring queen plots to
Brain Teasers
Jelly Beans
You have three jars that are all mislabeled. one contains peanut butter jelly beans, another grape jelly jelly beans, and
Brain Teasers, Logic Puzzles, Microsoft Interview Questions
Bridge
Problem: this one is a classic that many of you have probably already heard, but all the more reason why
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