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3 Clock Hands - Google Interview Question How many degrees are there in the angle between the hour and minute hands of a clock when the time is a quarter past three? logic mathematics Submitted by Valentin	Doable 4.3
3 2 Tea and Wine You take a spoon of wine from a barrel of wine and put it into your cup of tea. Then you return a spoon of the (non-uniform) mixture of tea and wine from your cup and put it in the barrel. Now you ha ... Math logic Submitted by Ravi	Doable 4.4
3 Bug's Eye You are a bug sitting in one corner of a cubic room. You wish to walk (not fly) to the extreme opposite corner – the corner furthest from you. Describe the shortest path that you can walk. geometry trigonometry Submitted by Ravi	Easy 3.1
3 1 Troll Toll You are on your way to visit your Grandma, who lives at the end of the valley. It’s her birthday, and you want to give her the cakes you’ve made. Between your house and her house, you have to cross ... Submitted by Aakash	Doable 3.3
3 6 Crazy Google Interview Question You are shrunk to the height of a nickel and your mass is proportionally reduced so as to maintain your original density. You are then thrown into an empty glass blender. The blades will start moving ... interview google open-ended Submitted by Valentin	Doable 6.0
6 Three Idols Here's a classic: Three gods A, B, and C are called, in some order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a comp ... logic programming inference Submitted by Aakash	Hard 10.0
2 3 The Cabin There is a man lying face-down, dead, in the middle of a cabin. The cabin is in the middle of the woods. There are windows, but they do not open. What is going on? brain teaser riddle Submitted by Valentin	Doable 6.0
3 Gone Camping Camp Crona’s cook, Allison, was just about to begin preparing the picnic lunch for all the campers. She already knew she needed to fill 55 bowls of the same size and capacity with the same amount of fo ... mathematics Submitted by Aakash	Doable 3.3
4 2 Balloon Business You’re sitting in a stationary car. There’s a helium balloon tied to its floor. You accelerate and, obviously feel like you’re being pushed backwards (against the direction of your acceleration). W ... physics science logic Submitted by Valentin	Doable 4.7
3 Boys and Girls To help solve an acute national over-population problem, a government issues a radical decree that families must stop having children as soon as they have had one son. After a while, there are some ... reasoning probability statistics Submitted by Aakash	Doable 6.0
2 4 Don't Mate in One This problem was first publicized by Karl Fabel, a German chess problemist. Find a move for white that will not result in an immediate checkmate of the black king. logic chess Submitted by Aakash	Hard 7.3
2 2 Up and Down Explain the following scenario: A man lives on the twelfth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets int ... Submitted by Valentin	Hard 8.4
2 4 Psycho Killer While at the funeral of her mother, she met a man whom she did not know. She thought he was amazing, her dream guy, and she fell in love with him but never asked for his number and could not find him ... Submitted by Valentin	Doable 3.3
1 2 Nice to meet you At a secret meeting, everyone shakes hands exactly once with every other person present. Altogether there are forty-five handshakes. How many people attended the meeting? mathematics combinatorics Submitted by Ravi	Easy 2.8
2 1 Time To Fuse You have a string-like fuse that burns in exactly one minute. The fuse is inhomogeneous, and it may burn slowly at first, then quickly, then slowly, and so on. You have a match, and no watch. How do ... physics logic rates Submitted by Valentin	Hard 6.8