• Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : Form Seven Squares Match Stick

Difficulty Popularity

In the given picture, you can see a figure made with twenty matchsticks. In this figure, you can see a total of five squares - four 1x1 squares and one 3x3 square.

You have to form seven squares of any size (closed ones) by just moving two matchsticks. Also, you can't break the matchsticks or overlap them.

How can this be done?

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  • Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Logic Birthday Puzzle

Difficulty Popularity

For my anniversary, I decided to surprise my wife. Since she is a voracious reader, I decided to collect a lot of books for her. On the first day of the month, I bought one book, on the second, I bought two and on the third, I bought three. This process went on till the anniversary and on the day, I had 276 books with me to gift her.

Can you calculate, on which day is our anniversary?

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Picture Mind Teaser

Difficulty Popularity

You are given with six marbles of three different colors. Arrange them in a manner that each one of them touches all four marbles of different colors.

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Logical Problem Riddle

Difficulty Popularity

There is one apple tree near my home. In this apple trees, there are some apples.
But after a mild wind, there are neither apples on tree nor on ground.

Explain ?

  • Views : 90k+
  • Sol Viewed : 30k+

Mind Teasers : Extremely Hard Civil Services Problem

Difficulty Popularity

( ) + ( ) + ( ) + ( ) + ( ) = 30
This is what you have for equation. The following are the numbers that you can use to fill in the brackets:
1, 3, 5, 7, 9, 11, 13 and 15

You can repeat the numbers if required. The resulting sum should be 30.

This question appeared in the UPSC final examination in December 2013. Out of all the people who appeared, only one guy was able to solve this namely Gaurav Agarwal.

Can you solve it?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Math IQ Question

Difficulty Popularity

Adam is one of the finalist in an IQ championship. As the final test, he is provided with two hourglass. One of them can measure eleven minutes while the other one can measure thirteen minutes.
He is asked to measure exactly fifteen minutes using those two hourglasses. How will he do it ?

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Pirates Probability Brain Teaser

Difficulty Popularity

You are stuck with the pirates who might even kill you on board. They give you a chance to survive. There are hundred black rocks and hundred red rocks. There are two empty sacks which are labelled as heads and tails respectively. You have to divide the rocks in two bags as per your wish. Then a fair coin will be flipped. If its heads, you will have to pick a rock on random from the sack labelled heads and if its tails, you will pick up from the tails sack. If you pick up a black rock, you will be freed and if you pick up a red rock, you will be killed.

How will you distribute the rocks so that your chances of survival are the best?

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Murder Mystery Puzzle

Difficulty Popularity

One evening there was a murder in the home of married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Tricky Math Race Riddle

Difficulty Popularity

Rooney, Hernandez, and Robin race each other in a 100 meters race. All of them run at a constant speed throughout the race.

Rooney beats Hernandez by 20 meters.
Hernandez beats Robin by 20 meters.

How many meters does Rooney beat Robin by ?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Playing Cards Puzzle

Difficulty Popularity

I purchased five decks of card from the market and mixed them.
Now i have ( 5 * 52 = 260 cards).

What is minimum number of cards, i need to take out from the above 260 cards to guarantee at least one 'four of a kind'.

By Admin
  • Views : 80k+
  • Sol Viewed : 20k+

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?

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