## On A Hiking Trip Riddle

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves in five teams with seven members each, forming five rows.

How did they manage to achieve this formation ?

How did they manage to achieve this formation ?

Hint:

You can see that they decided to form a pentagonal formation.

YES NO

*Did you answer this riddle correctly?*YES NO

## Pills A And B Riddle

You have two bottles of pills marked with the label A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

Hint:

Cut each of the three pills in half and put each half in two piles. Now, each of the two piles will contain half of pill A and two halves of pill B.

Take one pill A and cut into half and put the two halves in the two piles. Now, each pile will have two halves of pill A and two halves of pill B which means one pill A and one pill B. You can take one pile today and one pile the next day.

YES NO

Take one pill A and cut into half and put the two halves in the two piles. Now, each pile will have two halves of pill A and two halves of pill B which means one pill A and one pill B. You can take one pile today and one pile the next day.

*Did you answer this riddle correctly?*YES NO

## Two Hour Glasses Riddle

Hint:

Let the hourglass with 7 minutes timeframe be x and the hourglass with 11 minutes timeframe be y.

Turn x and y together.

After seven minutes, turn x.

After 11 minutes, turn x again.

Now it will take 4 minutes for x to stop.

At that moment, you would have calculated 15 minutes.

YES NO

Turn x and y together.

After seven minutes, turn x.

After 11 minutes, turn x again.

Now it will take 4 minutes for x to stop.

At that moment, you would have calculated 15 minutes.

*Did you answer this riddle correctly?*YES NO

## 21 Jars Riddle

You have 21 jars with you. Out of them, 7 are filled with water, 7 are half-full with water and 7 are empty. How will you distribute the jars among three people such that each one of them gets the equal number of jars and equal amount of water?

Hint:

Give 3 full, 1 half-full and 3 empty bottles to the first person.

Give 3 full, 1 half-full and 3 empty bottles to the second person.

Give 1 full, 5 half-full and 1 empty bottle to the third person.

YES NO

Give 3 full, 1 half-full and 3 empty bottles to the second person.

Give 1 full, 5 half-full and 1 empty bottle to the third person.

*Did you answer this riddle correctly?*YES NO

## A Special Integer Riddle

A special integer exists in mathematics that shows a special property. If you subtract any number from that integer, the result will always be divisible by the successor of that number completely.

Do you know what that integer is ?

Do you know what that integer is ?

Hint:

The required integer is -1.

For an example, let us subtract 7 from -1.

-1 - 7 = -8

Now the successor of 7 is 8 and (-8) is exactly divisible by 8.

You can try that for any number and it will hold true.

YES NO

For an example, let us subtract 7 from -1.

-1 - 7 = -8

Now the successor of 7 is 8 and (-8) is exactly divisible by 8.

You can try that for any number and it will hold true.

*Did you answer this riddle correctly?*YES NO

## How Many Balls Riddle

In the drawer beside your bed, you have three orange, two pink and five purple balls. There is no electricity and the room is completely dark. How many balls you must take out to make sure you have one ball of each color at least?

Hint:

9

2 < 3 < 5

To find out the required number of balls, take one in place of the least number (i.e. take one pink ball) and then add all the greater numbers (i.e. three orange and five purple balls) to it.

Required number of balls = 1 + 3 + 5 = 9.

YES NO

2 < 3 < 5

To find out the required number of balls, take one in place of the least number (i.e. take one pink ball) and then add all the greater numbers (i.e. three orange and five purple balls) to it.

Required number of balls = 1 + 3 + 5 = 9.

*Did you answer this riddle correctly?*YES NO

## Eating Burgers Riddle

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours ?

How many burgers can 9 boys eat in 3 hours ?

Hint:

18

More hours => more burgers.

More boys => more burgers.

The time become twice (3 hours / 1.5 hours).

Boys become six times (9 / 1.5).

Number of burgers = 2 * 6 * Original(1.5)

= 18

YES NO

More hours => more burgers.

More boys => more burgers.

The time become twice (3 hours / 1.5 hours).

Boys become six times (9 / 1.5).

Number of burgers = 2 * 6 * Original(1.5)

= 18

*Did you answer this riddle correctly?*YES NO

## Accepting The Bet Riddle

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example

If the balls you picked had the numbers 6 and 13, you lose $1.

If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example

If the balls you picked had the numbers 6 and 13, you lose $1.

If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Hint:

Yes, you should accept the bet. Simply because the odds of picking two relatively prime numbers are 60%. It is a win-win situation for you if you keep playing.

YES NO

*Did you answer this riddle correctly?*YES NO

## Captured By The Riddler

In the land of Geopolizza, three men were captured by the infamous Riddler. So, the Riddler buries the three men, named 1, 2 and 3 in such a manner, that 1 is in the front, 2 in the middle and 3 in the back. They are buried neck deep, and cannot move, not even their heads. He shows them 5 caps, two of which are red and 3 of them are white. He then switches off the lights and places a hat on top of their heads. The situation is such that no one can see their hat color, 1 is facing the wall and cant say anything, 2 can see 1 and 3 can see both 1 and 2. Then he tells the rules of his game: "If either of you three can tell the correct color of your head, I will let all of you go. However, if any of you answer wrong, all 3 of you will instantly die. Time is 3 minutes."

Upon 2 and half minutes passing, A shouts the answer and all 3 are released free. How did he know the correct answer ?

Upon 2 and half minutes passing, A shouts the answer and all 3 are released free. How did he know the correct answer ?

Hint:

P3 can only be certain of his cap if 1 & 2 are both white. Since he is not certain then 1 & 2 must be either white/red or red/red. 2 knows this but the only combination that he will be able to know the colour of his own cap is if he sees that 1 is wearing a white cap. 1 knows this but as 2 remains uncertain then 1 must be wearing a red cap.

YES NO

*Did you answer this riddle correctly?*YES NO

## A Pack Of 40 Cards

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face up cards. Remember, you are blindfolded.

How will you do it?

How will you do it?

Hint:

Create a new deck of the exactly same number of cards as are face up cards in the original deck.Take 15 number of cards in a new deck and change their face direction. For example- You create a new deck of 15 cards and out of 15, 5 faces up in a new deck. So remaining 10 faces up are in the old deck. But hey! while creating the new deck you reversed the face direction of new cards. So actually the 5 cards which were facing up are actually face down in the new deck while 10 faces up.

YES NO

*Did you answer this riddle correctly?*YES NO

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