Mind Teasers : Math Head Tails Coin Puzzle

Difficulty Popularity

Christopher and Jonathan were having bets. They decide that a coin will be flipped twenty times and each time it turns heads, Christopher will give $2 to Jonathan and each time it turns out to be Tale, Jonathan will give 3$ to Christopher. After flipping for twenty times none of the both won or lost any amount.

How many times did the coin landed on Heads ?
category : MATHS

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Mind Teasers : Box Ball Logic Problem

Difficulty Popularity

There are three bags.The first bag has two blue rocks. The second bag has two red rocks. The third bag has a blue and a red rock. All bags are labeled but all labels are wrong.You are allowed to open one bag, pick one rock at random, see its color and put it back into the bag, without seeing the color of the other rock.

How many such operations are necessary to correctly label the bags ?
category : LOGIC | TRICK

Mind Teasers : Most Popular Monty Hall Brain Teaser

Difficulty Popularity

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.

After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter ?

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?
category : LOGIC | MATHS

Mind Teasers : Simple Matchstick Riddle

Difficulty Popularity

You can see that four match sticks have been joined in the given figure to form one square.

Can you form five squares using six matchsticks ?

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?
category : LOGIC | MATHS

Mind Teasers : Very Hard Math Question

Difficulty Popularity

There stand nine temples in a row in a holy place. All the nine temples have 100 steps climb. A fellow devotee comes to visit the temples. He drops a Re. 1 coin while climbing each of the 100 steps up. Then he offers half of the money he has in his pocket to the god. After that, he again drops Re. 1 coin while climbing down each of the 100 steps of the temple.

If he repeats the same process at each temple, he is left with no money after climbing down the ninth temple. Can you find out the total money he had with him initially?
category : LOGIC | MATHS

Mind Teasers : Toughest Number Series Question

Difficulty Popularity

Solve the number series by identifying the last number.

1 4 5 6 7 9 11 ?
category : LOGIC | SERIES

Mind Teasers : Inspector Montalbano Mystery Puzzle

Difficulty Popularity

Before going to work, Inspector Montalbano got into the fight with his wife. After coming back from the work he found out that the police was in the home and his wife had just killed a burglar.
The police told that she killed the burglar in self-defense. She told her husband the story that she heard a doorbell and thought that it was me and as soon as she opened the door, the burglar jumped into her and she was so scared that she killed burglar immediately with the knife. Inspector Montalbano asked the police to arrest her wife for murder conspiracy. Why?
category : LOGIC | MYSTERY

Mind Teasers : Dirt Hole Tricky Riddle

Difficulty Popularity

How many cubic meters of dirt are in a hole of 20 meter long and 30 meter wide.

Mind Teasers : Tricky Maths Expression

Difficulty Popularity

By using the numbers 8,5 1 and 1 exactly once and with the help of basic operation (+, -, /, *), Can you form an expression with a value of 10?

Note: Parentheses are allowed
category : MATHS | EQUATION

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