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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Mind Teasers : The sheep and the grass logical puzzle

Difficulty Popularity

If we tie a sheep to one peg, a circled grass is been eaten by the sheep. If we tie the sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the sheep. If we want an eclipse then we put two pegs then put a rope in between then and the other end of the rope is tied up on the sheep's neck.

Question: how should we tie the peg and the sheep so that a square is eaten out from the garden's grass? We only have one sheep's rope and the peg and the rings.
category : LOGIC

Mind Teasers : Password Brain Teaser

Difficulty Popularity

Angelina Jolie is trapped in a tomb. The only way to escape is figure out a 13 character password. Following are the five clues that are available to her.

Precisely two of the below statements are false.
The password is confined within this sentence.
The password is not in this hint.
The password is inside only one of these statements.
At least one of the above statement is a lie.
category : LOGIC

Mind Teasers : Logical Murder Mystery Brain Teaser

Difficulty Popularity

The store room of your house is locked with a certain lock that can be closed without a key but requires a key to open which you own (there is no duplicate key). You decide to move your old stuff in the storeroom. After keeping the things carefully, you lock it back again perfectly. The next day, a dead body is found in your closed store room. Since only you have the key to the store room and you live alone, the police suspects you as a murderer. You can’t understand anything when suddenly a thought strikes your mind. There is a possible way using which the dead body could have been placed by someone else.

Can you find that way so you can tell the police and prove yourself to be innocent?
category : LOGIC | MYSTERY

Mind Teasers : Awesome Clock Puzzle

Difficulty Popularity

Time 12:21 is a palindrome as it reads the same forwards or backwards.
Whats the Whats the shortest interval between two palindromic times ?

example => 11:11 and 12:21 has interval of 1 hr 10 minutes.
category : LOGIC

Mind Teasers : King Gift Puzzle

Difficulty Popularity

King Charles want to send the diamond ring to his girlfriend securely.He got multiple locks and their corresponding keys.His girl friend does not have any keys to these locks and if he send the key without a lock , the key can be copied in the way.How can charles send the ring to his girl friend securely .
category : LOGIC | TRICK

Mind Teasers : Tricky Mathematician Problem

Difficulty Popularity

A mathematician was challenged to write nineteen in a manner that if one was taken out of it, it became twenty. He failed to do it.

Can you help him?

Mind Teasers : Math Number Riddle

Difficulty Popularity

A man wanted to get into his work building, but he had forgotten his code. However, he did remember five clues. These are what those clues were:

The fifth number plus the third number equals fourteen.

The fourth number is one more than the second number.

The first number is one less than twice the second number.

The second number plus the third number equals ten.

The sum of all five numbers is 30.

What were the five numbers and in what order?
category : LOGIC | MATHS

Mind Teasers : The Better Proposal Puzzle

Difficulty Popularity

A 12-year footballer Lavy was offered a contract with a club name "Flyball" that if he will practice 1 hour extra after school he will be offered 11$ after every week.
Lavy, however, suggested an alternative paid method in which
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till 11th day.

Should the club accept the offer of Lavy?

category : LOGIC | MATHS

Mind Teasers : Football 2014 World Cup - The Pots Quiz Riddle

Difficulty Popularity

You need to pick one entry from potA and one from potB to have a perfect match.
Can you do it?

This will test your football knowledge of 2014 football world cup.

category : LOGIC

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?

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