• Views : 70k+
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Mind Teasers : Mathematical Equation Riddle

Difficulty Popularity

Replace the '?' by any mathematical symbol to make the expression equal to 99.

18 ? 12 ? 2 ? 3 = 111

Discussion
Suggestions
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Mind Teasers : Math Brain Teaser High School

Difficulty Popularity

There are two natural numbers whose sum is less than hundred and both of them are greater than one. Two friends Leena and Nadia knows the product and sum of the numbers respectively.

Both of them are exchanging the following statements:

Leena: I don’t know the numbers.
Nadia: "I knew you wouldn't be. I am not aware myself."
Leena: "Now I am sure I know the numbers!"
Nadia: "Now I am sure I know the numbers too!"

Can you find the two numbers?

  • Views : 40k+
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Mind Teasers : Popular Probability Brain Teaser

Difficulty Popularity

Kangwa, Rafael and Ferdinand plans for gun fighting.
They each get a gun and take turns shooting at each other until only one person is left.

History suggest
Kangwa hits his shot 1/3 of the time, gets to shoot first.
Rafael, hits his shot 2/3 of the time, gets to shoot next if still living.
Ferdinand having perfect record at shooting(100% accuracy) shoots last , if alive.

The cycle repeats. If you are Kangwa, where should you shoot first for the highest chance of survival?

  • Views : 70k+
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Mind Teasers : Trick Missing Pound Riddle

Difficulty Popularity

I am a book lover and i saw a book for Pound 97.
I am short of money , so i borrowed Pound 50 from my sister and 50 from my brother = Pound 100.
I bought the book, and had Pound 3 change. I gave brother Pound 1 and my sister Pound 1 and kept the other Pound 1 for myself. Now I owe my mum Pound 49 and my brother Pound 49. 49+49 = 98 + my Pound 1 = 99.

Where is the missing Pound ?

  • 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 : 40k+
  • Sol Viewed : 10k+

Mind Teasers : May The Fastest Car Win

Difficulty Popularity

John is out with his class of 25 boys to a local park. Each guy has a remote controlled car with them. The park has a racetrack that allows 5 cars to be raced at once. Their teacher, Mr. Ted, declares that the top three fastest cars get ice cream.

How many races are required to determine the 3 fastest cars?

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

Mind Teasers : Terrorist Attack Security Puzzle

Difficulty Popularity

UNO plans a gathering.
However there is threat of terrorist attack. So security guard who is a mathematical plans somethings to secure the place.

A terrorist stands nearby the door where
1st ambassador comes , the security guard said 'twelve' and ambassador replied with 'six'.
2nd ambassador comes , the security guard said 'six' and ambassador replied with 'three'.

The terrorist thinks its enough and walks to the door.
The security person said 'eight' , terrorist replied 'four' and get immediately arrested.

why ?

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

Mind Teasers : What word am I ?

Difficulty Popularity

What word am I?

Insights:

* I am a nine letter word.

* I am the exact inverse to expression 'neighborly and active'

* I contain the word 'over'.

* I begin will a vowel.

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

Mind Teasers : Sunday Probability Riddle

Difficulty Popularity

Whats the probability of getting 5 Sunday(my favorite day) in a 31 day month ?

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

Mind Teasers : Maths Logical Brain Teaser

Difficulty Popularity

A man of faith visits the holy land where three temple are erected in a row offering a surreal divinity to the place. Awestruck at the sight of the magnificent temples, he visits the first temple where he finds that the number of flowers in his basket increases to double the number as soon as he sets his foot inside the temple. Astonished by the miracle he is completely happy and seeks it as a blessing of his god. He offers a few flowers to the stone idol of god and moves out.

Then he visits the second temple, where the same miracle happens again. The number of flowers in his basket again double up in number. With a smile on his face, he offers a few of flowers to the stone idol again and walks out after praying.

The moment he enters the third temple, the number of flowers increases to double again. Now he feels entirely blessed. He offers all the flowers at the feet of the stone idol and walks out in a moment of bliss.

When he walks out, he has no remaining flowers with him. He offered equal number of flowers at each of the temple. What is the minimum number of flowers he had before entering the first temple? How many flowers did he offer at each temple?

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

Mind Teasers : CheckMate All Kings Chess Puzzle

Difficulty Popularity

Can you checkmate all the kings in less than 10 moves?

Following are the rules:
1. White can make up to 10 legitimate moves until all kings are checkmate.
2. You can take any black piece(s) except the King.
3. Your king cannot be in check position at any time of the game.




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