Mind Teasers : what number replaces the question mark

Difficulty Popularity

Which number will come in the place of the question mark?

category : SERIES | MATHS

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Mind Teasers : Popular Interview Problem

Difficulty Popularity

I have two rectangular bars.

They have property such that when you light the fire from one end , it will take exactly 60 seconds to get completely burn.
However they do not burn at consistent speed (i.e it might be possible that 40 percent burn in 55 seconds and next 60 percent can burn in 10 seconds).

Problem is : How do you measure 45 seconds ?

Mind Teasers : Wild West Cowboy Riddle

Difficulty Popularity

In the Wild West, you challenge two cowboys - Hunter Jack and Sharp Shooter Leo into a death match. They being better shooter than you readily accept your challenge. But they don't want to waste bullets and thus lay down a certain rules that are accepted by you as well. Here are the rules:

1) Everyone shoot in a given order till only one is left.
2) Everyone shoot only once when his turn arrive.
3) If any one of you is injured, the other two will finish him off together.
4) The worst shooter gets to shoot first (which is you) and the best one shoots at the last.

Now, what tactics will you use if you know that you hit every third shot of yours, Jack hits every second shot and Leo hits every shot?

Mind Teasers : 8 Toothpicks Brain Teaser

Difficulty Popularity

Can you form eight squares of three different sizes by moving only two toothpick?

category : PICTURE

Mind Teasers : Palindrome Number Riddle

Difficulty Popularity

There can be myriad ways to create a palindrome. One day, I thought of making my own palindrome. I thought of a number and then decided to add the reversed number to it. Sadly, I did not get a palindrome.

So I kept repeating this step and eventually I succeeded in creating a palindrome. I don't know if you can always create a palindrome using this method but I was able to generate one of four digits.

Can you tell me the number at which I started?
category : LOGIC | MATHS

Mind Teasers : Chocolates In Hand Picture Puzzle

Difficulty Popularity

Can you count the number of chocolates in hand?

category : HUMOUR | PICTURE

Mind Teasers : Toughest Number Series Question

Difficulty Popularity

Solve the number series by identifying the last number.

1 4 5 6 7 9 11 ?
category : LOGIC | SERIES

Mind Teasers : Logic Picture Problem

Difficulty Popularity

As you can notice in the picture that ten coins have been arranged to form a triangle pointing upwards. What you have to do is move three coins and make that triangle point downwards. Can you do it in just 3 moves?

Mind Teasers : Homicide Detective Puzzle

Difficulty Popularity

A homicide detective is called at a crime scene. A man is lying dead in front of the building and seeking the position of the windows on the building and the position in which the body is lying, it is evident that the man jumped out from one of them and committed suicide.

The detective asks his team to collect the traces if they can find any on the body and heads towards the building. He goes to the first floor and towards the room that is on the front side. Inside the room, he lights a cigarette, walks towards the window facing the dead body, opens the window and throws out the cigarette. He then goes to the second floor and repeats the same process.

He keeps doing the same thing till he is done with all the floors and then takes the lift to the ground floor. Upon reaching there, he informs the team that it is not a suicide but a murder.

While the whole team is shocked to hear the revelation, he lights another cigarette and takes a hard puff.

How do you think he found out that it was a not a suicide?
category : LOGIC | MYSTERY

Mind Teasers : Impossible Brain Teaser

Difficulty Popularity

In a recreational activity, you are given four different jars of 2 liters, 4 liters, 6 liters and 8 liters respectively with an unlimited water supply. Then you are asked to measure exactly 5 liters of water using them.

How will you do it?

Mind Teasers : Smartest Phone Brain Teaser

Difficulty Popularity

Armed robbers invaded a bank. They were busy looting when suddenly a phone rang. The phone happened to be at the reception. One of the robber asked the receptionist to attend the call and talk without giving away the situation. The call happen to be from her mother. She spoke, 'Do you have any emergency mom? Can you give me a call when I get home, I could really use your help in buying new curtains?' Then she hangs up.

The robbers are busy when the police arrives suddenly along with the mother of the receptionist. How did she know about the robbery?

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