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### Hard Logic Puzzles

Hard Logic Puzzles 1 : River Riddle
Difficulty ★★★★☆        Popularity ★★★★★

Four people need to cross a dark river at night.They have only one torch and the river is too risky to cross without the tourch. if all people cross simultanoesly then torch light wont be sufficient.Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the river ?
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Hard Logic Puzzles 2 : Logic Escape Problem
Difficulty ★★★★☆        Popularity ★★★★★

In the kingdom of skull, King Norse did not allow any citizen to visit the world outside. Also only a person with a proper paperwork was allowed to enter or he was sent back. A wooden bridge was what connected the kingdom to the world. The king had appointed a sharpshooter who would check every five minutes on the bridge to check. After checking, he would go back to his hut and return exactly after five minutes again. The bridge took 9 minutes to cross.

A merchant was able to escape the kingdom without harming the shooter.

How ?
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Hard Logic Puzzles 3 : Sherlock Holmes Murder Mystery Riddle
Difficulty ★★★★☆        Popularity ★★★★★

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great lord....following a gunshot.

Sherlock smiles Of-course its a murder.

Why did he think so?
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Hard Logic Puzzles 4 : Awesome Idea Puzzle Problem
Difficulty ★★★★☆        Popularity ★★★★★

Dwayne Johnson was running away with the loot from a heist in his car along with Vin Diesel. One tire was punctured and he dropped down to replace it. While changing the wheel, he dropped the four nuts that were holding the wheel and they fell into a drain. Vin Diesel gave him an idea using which they were able to drive till the rendezvous point.

What was the idea ?
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Hard Logic Puzzles 5 : Adobe Cool Logical Interview Puzzle
Difficulty ★★★★☆        Popularity ★★★★★

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with capacity 4 liters, 8 liters and 10 liters and you have a large tank of water. Now you have to measure 3 liters of water precisely using those buckets. How will you do it?
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Hard Logic Puzzles 6 : Popular Age Problem
Difficulty ★★★★☆        Popularity ★★★★★

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you man?
Bill: Not bad, got married and I have three kids now.
Jack: That"s awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don"t know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh now I get it.

How old are Bill"s kids?
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Hard Logic Puzzles 7 : Tricky Logical Puzzle
Difficulty ★★★★☆        Popularity ★★★★★

I have one of the three numbers: 1, 2 or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?
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Hard Logic Puzzles 8 : IAS Logic Problem
Difficulty ★★★★☆        Popularity ★★★★★

Anabelle is a clever trader of rare artifacts. Each day she carries three boxes with each filled with thirty artifacts. The boxes canĂ¢€™t hold more than that. She travels far of northern lands to sell these artifacts but on way, she comes across thirty checkpoints where she has to shed one of the artifact for each sack to the authorities for letting her pass.

How many artifacts will be left with her when she reaches her destination crossing all the check points ?
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Hard Logic Puzzles 9 : Oracle Probability Interview Question
Difficulty ★★★★☆        Popularity ★★★★★

What is the probability of choosing the correct answer at random from the options below.

a) 1/4
b) 1/2
c) 1
d) 1/4
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Hard Logic Puzzles 10 : Logic Interview Question
Difficulty ★★★★☆        Popularity ★★★★★

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its color and put it back into the box, without seeing the color of the other ball.

How many such operations are necessary to correctly label the boxes?
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