• Views : 30k+
  • Sol Viewed : 10k+

Mind Teasers : Mathematical Number Riddle

Difficulty Popularity

There is one four-digit whole number n, such that the last four digits of n2 are in fact the original number n

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

Mind Teasers : Induction Brain Teasers

Difficulty Popularity

Three college toppers are summoned by the inspecting faculty. To identify the best from them, the faculty takes them into a room and places one hat on each of their heads. Now all of them can see the hats on other’s heads but can’t see his own. There are two colored hats – green and red.

Now the faculty announces that he had made sure that the competition is extremely fair to all three of them. He also gives them a hint that at least one of them is wearing a red hat. Now the first one who is able to deduce his own hat color will be awarded the most intelligent student of all award. After a few minutes, one of them raises his hand and is able to deduce the color correctly.

How?

  • Views : 60k+
  • Sol Viewed : 20k+

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?

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

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.

By Admin
  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Magician Cards Riddle

Difficulty Popularity

A magician has four playing cards in random order in his hand ( 3 4 5 and 6)

Magician wishes them placed in ascending order from his left to his right.

* To do this, he pulls the leftmost card (from viewer perspective) and puts it end.
* He then takes the third card from the right (from viewer perspective) and puts it in end.

What is the original order of the cards from magician perspective?

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

Mind Teasers : Popular Castle History Puzzle

Difficulty Popularity

A square island comprised of a square castle. A 14m wide trench surrounded the island from everywhere. Roman Empire wanted to invade the castle and gain the loot as well as possession of the island. They brought along wooden planks to cross the trench. However, they realized that the planks were just 13m long.

How did they use those planks to invade as well as capture the island ?

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

Mind Teasers : Hard IAS Brain Twister

Difficulty Popularity

An international IQ test is held on knockout terms in November 2013. The final contestants are from Britain and America respectively. Both of them are handed over the final test paper which they have to fill for evaluation. They have to write their names and date on the paper. When the evaluators are handed over the sheets, they find out that both the guys have same name. In no manner can they identify which sheet belongs to whom.

Can you identify the date on which the competition was held?

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

Mind Teasers : The Hundred Number Puzzle

Difficulty Popularity

We can create number 100 by using all numbers, i.e.0123456789 and mathematical operators (+/-) in many ways.
Example
98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition that the use of the number 21 is the must. Then there are only a few solutions.

One of such solution is:
98 - 7 - 6 - 5 - 4 + 3 + 21 = 100

Can you tell any other solution?

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

Mind Teasers : Logical Problem

Difficulty Popularity

Four stupid friends meet each other after long time.They are so stupid that they start talking about their suits

* There were a total of eight suits, two in each color, black, brown, pink and white.
* Each friend owned two suits.
* No friend had two suits of the same color.
* Ganpat don't have a white suit.
* Harish don't have a black suit, but did have a brown one.
* One of the friends had a white suit and a pink suit and another friend had a brown suit and a pink suit.
* Manoj had a white suit.
* Tarun had a pink suit, but don't have a brown one.

Can you work out which friend had which color suits?

  • Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : The problem of the family of Amazon

Difficulty Popularity

While walking through the deepest jungle of the amazon, Steve the explorer came across a mystical tomb. He went closer and it read:
"Here lies two faithful husbands, with their two faithful wives,
Here lies two grandmothers along with their two granddaughters,
Here lies two dad's along with their two beloved daughters,
Here lies two mothers along with their two lovely sons,
Here lies two maidens along with their two charming mothers,
Here lies two sisters along with their two amazing brothers.
All were born legitimate, with no incest."
Steve, then checked and saw that there were only 6 graves in total

How was this possible? Steve needs your help to figure it out.

  • Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : IAS Interview Problem

Difficulty Popularity

I need to divide numbers from 1 to 9 into two group such that sum of numbers in one group is equal to the sum of other group.
Note : 6 cannot be flipped over to make it 9.

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