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Mind Teasers : Quick Thinking Maths Problem

Difficulty Popularity

A petri dish kept in a lab has a colony of healthy bacteria. Every bacterium divides itself into two in exactly two minutes. Now the colony started with a single cell at 2 pm. If the petri dish was exactly half full of bacteria at 3 pm, when will the dish become full of bacteria?

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  • Views : 70k+
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Mind Teasers : Crossing The River In Minimum Time Puzzle

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 torch.
* If all people cross simultaneously 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 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

By Admin
  • Views : 70k+
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Mind Teasers : Measure Water Supply Brain Teaser

Difficulty Popularity

You had an infinite supply of water and a 5 ml and 3 ml gallons.

How would you measure exactly 4 ml in least number of steps ?

  • Views : 40k+
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Mind Teasers : Riddle For Smart People

Difficulty Popularity

A teacher is told that the principal of the school will be inspecting his class on the next day. Now, the teacher is worried for the impression that his class might cast on the principal since all the students are not intelligent. Also, the principal can ask questions from anywhere. However, he will have the power to choose any student for answering the question.

Now he wants that the principal must be impressed with the performance of his class. What will he do to maximize the final impression on the principal ?

  • Views : 60k+
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Mind Teasers : Tricky Iq Question

Difficulty Popularity

In a jar, there are some orange candies and some strawberry candies. You pick up two candies at a time randomly. If the two candies are of same flavor, you throw them away and put a strawberry candy inside. If they are of opposite flavors, you throw them away and put an orange candy inside.

In such manner, you will be reducing the candies in the jar one at a time and will eventually be left with only one candy in the jar.

If you are told about the respective number of orange and strawberry candies at the outset, will it be feasible for you to predict the flavor of the final remaining candy ?

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Mind Teasers : Infosys Logic Brain Teaser

Difficulty Popularity

Imagine a picture in your mind. There is a rose plant. A few roses have grown up in the plant. There are a few bees hovering over them.

Now read the given statements carefully:
1) If every one of the bees lands on a rose, one of them won't get a rose.
2) If two bees share rise together, then there will be one rose left without any bee.

Can you find out the number of roses on the plant and the number of bees?

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Mind Teasers : Awesome Probability Logic Riddle

Difficulty Popularity

You need to divide 50 marbles(25-red and 25-blue) into two boxes such that the probability of picking red marble is maximized.

Following conditions need to hold true :
1. None of box is empty
2. All the marbles must be in one of two boxes.

By Admin
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Mind Teasers : Decrypt Password Riddle

Difficulty Popularity

A person has uncovered a secret that was a mystery for ages. He transfers the data into his hard drive and encrypts the drive with a password. Then, he writes a line on a paper to remember the password.

The line says 'You force heaven to be empty'.

Can you decrypt the line to reveal the password if you know that the password is seven characters long that comprise of just letters and numbers?

  • Views : 40k+
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Mind Teasers : Tricky Glass Riddle

Difficulty Popularity

Six identical glasses are in a row.
The first three glasses are filled with juice, and the last three glasses are empty.
By moving only one glass, can you arrange them so that the full and the empty glasses are alternate?

By Admin
  • Views : 40k+
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Mind Teasers : World War I History Riddle

Difficulty Popularity

Two companions Terry and Garry were talking about their families. Terry told some great stories about his courageous grandfather who fought for Britain in "World War I". Terry told that his grandfather is so brave that he was awarded a bravery honour medal with words "For our Courageous Soldiers In World War I" embedded into it.

Garry Knows that his friend is lying? How ?

By Admin
  • Views : 80k+
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Mind Teasers : Break Chocolate Bar Logic Puzzle

Difficulty Popularity

You have a rock solid dark chocolate bar of size 2 x 8. You need to break it and get 1 x 1 pieces of that chocolate.

If you can break that bar only along its length or breadth, how many times will you have to break to get the 1 x 1 pieces?

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