Date

In a group, there are 10 boys and 10 girls.
Each girl has 4 boyfriends.
And all boys has equal number of girlfriends.


Question: How may ways they can date each other so that everyone goes on a date with one of his/her partner only?

[Post your answers with explanation in the comments]

Fill the jar

You have two water jugs A & B, how would u manage to fill the jug A with 2 litres of water.

Conditions:
1. The jugs are not graduated.
2. You are free to move water from one jug to other.
3. You can take extra water or throw it out of jug.
4. Third Jug or measurement tool is not allowed.
5. The water should b exactly 2 liters, not estimated.

Capacity:
Jug A = 4 Litres
Jug B = 3 Litres

[Post your answers with explanation in the comments]

Tom and Jerry Race

Tom and Jerry ran a 200 m race.
When Tom reached the finish line; Jerry was 10 m behind him.

So next time, Jerry made Tom stand 10 m behind the start line & both ran with same speed as in the earlier race.

Question: Who will win this time ?

[Post your answers with explanation in the comments]

Daughters' Age

Two MIT math grads bump into each other at Fairway on the upper west side.

They haven't seen each other in over 20 years.
First grad says to the second: "How have you been?"
Second: "Great! I got married and I have three daughters now"
First: "Really? How old are they?"
Second: "Well, the product of their ages is 72, and the sum of their ages is the same as the number on that building over there.."
First: "Right, ok.. oh wait.. hmm, I still don't know"
Second: "Oh sorry, the oldest one just started to play the piano"
First: "wonderful! my oldest is the same age!"

Question: How old are the daughters

[Post your answers with explanation in the comments]

2 Triangles

You have four bars, which have different integer lengths.
You construct a triangle using 3 of them.
When you make a new triangle by substituting one of the bars with the fourth one, you realize that these two triangles are similar triangles.

Question: What is the minimum possible total length of these four bars?

[Post your answers with explanation in the comments]

Maximum Bananas

A horse is having 2700 bananas which it whats to transfer from point A to point B.

Distance between A and B is 900Km.

It can take 900 bananas at a time and it eats 1 banana after every 1km.

Question: How many maximum bananas he can carry to point B??

[Post your answers with explanation in the comments]

Image Credits: stlucia.gov.lc

Aliens

You are an explorer who arrived on planet Bypolar. The Bypolarians come in two species: the Falsians and the Truans. The Falsians always lie whereas the Truans always tell the truth. Alas, you do not know how to distinguish them.

In any case, two locals are waiting for you.

First Bypolarian: You are most welcome on our planet. You are safe here.

Second Bypolarian: You must leave at once. You are in danger.

First Bypolarian: Do not mind my friend, he always lie.

Second Bypolarian: Ah… we always disagree.

Question: Should you be worried or relaxed?

[Post your answers with explanation in the comments]

Image Credits: drwill.com

Cross the Bridge

4 persons need to cross a bridge.
All take different time to cross the bridge.
Only 2 persons can cross the bridge simultaneously.
There is darkness,so they also need a lamp to cross it and hence the 2 people crossing the bridge should reach the other end at the same time.
They have only one lamp with them, So one person must come back with the lamp.

If these 4 persons take 1,2,5 and 10 minutes to cross the bridge

Question: What is the shortest time in which they can cross it?

[Post your answers with explanation in the comments]

Image Credits: demystifyingmedicine.od.nih.gov

5 Pirates

Five pirates on an island have one hundred gold coins to split among themselves.

They divide the loot as follows:
The senior pirate proposes a division, and everyone votes on it. Provided at least half the pirates vote for the proposal, they split the coins that way.
If not, they kill the senior pirate and start over.
The most senior (surviving) pirate proposes his own division plan, and they vote by the same rules and either divide the loot or kill the senior pirate, as the case may be. The process continues until one plan is accepted. Suppose you are the senior pirate.

Question: What division do you propose?

The pirates are all extremely logical and greedy, and all want to live.

Source: Srishti 2008 Puzzle-II

[Post your answers with explanation in the comments]

Image Credits: sixthman.net

Einstein Quiz

Below is a quiz written by Einstein last century. He said that 98% of the people in the world cannot solve the quiz. Are you among the other 2%?
Here you go...

Facts:
1: There are 5 houses in 5 different colors
2: In each house lives a person with a different nationality.
3: These 5 owners drink a certain beverage, smoke a certain brand of cigar and keep a certain pet.
4: No owner has the same pet, smoke the same brand of cigar or drink the same drink.

HINTS:
1: The British lives in a red house.
2: The Swede keeps dogs as pets
3: The Dane drinks tea
4: The green house is on the left of the white house (it also means they are next door to each other)
5: The green house owner drinks coffee
6: The person who smokes Pall Mall rears birds
7: The owner of the yellow house smokes Dunhill
8: The man living in the house right in the center drinks milk
9: The Norwegian lives in the first house
10: The man who smokes Blend lives next to the one who keeps cats
11: The man who keeps horses lives next to the man who smokes Dunhill
12: The owner who smokes Blue Master drinks beer
13: The German smokes Prince
14: The Norwegian lives next to the blue house
15: The man who smokes Blend has a neighbor who drinks water

Question: Who Keeps Fish?

Source: http://www.desiboyzmasala.com/article.asp?id=1357&at=20&c=1&s=da&o=u&wp=1&ps=25

[Post your answers with explanation in the comments]

Image Credits: egge.net

Poisoned Wine

You are the ruler of a medieval empire and you are about to have a celebration tomorrow. The celebration is the most important party you have ever hosted. You've got 1000 bottles of wine you were planning to open for the celebration, but you find out that one of them is poisoned.

The poison exhibits no symptoms until death. Death occurs within ten to twenty hours after consuming even the minutest amount of poison.

You have over a thousand slaves at your disposal and just under 24 hours to determine which single bottle is poisoned.

You have a handful of prisoners about to be executed, and it would mar your celebration to have anyone else killed.

Question: What is the smallest number of prisoners you must have to drink from the bottles to be absolutely sure to find the poisoned bottle within 24 hours?

[Post your answers with explanation in the comments]

Image Credits: specialtygiftgallery.com

Casino

The organizer rolls two dice.

But before that you need to predict the sum of the numbers that come at the top.

Question: Which number would you choose.

[Post your answers with explanation in the comments]

Image Credits: nucleuslearning.com

Medicine

A certain elderly man has to take two anti-cancer drugs Xeloda and Zanosar everyday, at 1 tablet of each drug.

Problem is that both come in blue square pills of same size, weight etc.

He keeps these drugs in two separate small bottles.

One day when taking the medications, he found that he had three pills in his hand, 2 Xeloda and 1 Zanosar, but he cannot figure out which one is which.

Now he must take his meds every day otherwise his cancer will get fatal.

Also anti-cancer drugs are so strong that he cannot take more than 1 tablet or he will have severe side effects.

Question: So what can he do?

Do not say throw away the pills, there are costly as hell.

[Post your answers with explanation in the comments]

Image Credits: nanopaprika.eu

Caps - 2

A,B,C are three intelligent persons.

A professor arranged them in a row with A in front ,B behind him and C behind them.

He had five caps-3 red and two green.

He then put a red or green cap on each so that C can see A's and B's cap,

but not his and B can see A's but not his or C's.A can't see no ones cap.

The professor asked them to say the hat in their head.

After a while A said correctly.

Question: What was the colour of hat he is having??

[Post your answers with explanation in the comments]

Image Credits: highsnobiety.com

Caps

Four youngsters enter a contest.

In a room, they were made to sit on the chairs arranged in a particular fashion.

There was a opaque wall.

A single chair was kept on the one-side (say X) of the wall and other three chairs were kept on the other side (say Y) back to back in a line.

Remember that all the chairs are facing the wall.

Now, the lads were asked to occupy their seats.

'A' occupied the chair kept on the 'X' side of the wall.

Now comes the 'Y' side of the wall....

'B' occupied the 1st chair kept on the 'Y' side of the wall.

'C' on the 2nd and 'D' on the 3rd chair.

Later, a cap, either red or green, was placed on the head of the each guy.

The guy doesn't know which colored cap is there on his head, but he could obiviously see the color of the cap placed on the guy's head seating in front of him.

Task was if anyone guy could tell the color of the cap he's wearing the team wins .

A guy did and they won the prize.

Now, here is the question.

Question: You have to tell me who's that guy and how was it done?

if :

>A had red

>B had red

>C had green

>D had green cap

They were told that there are only four caps, two red and two green.

[Post your answers with explanation in the comments]

Image Credits: highsnobiety.com

Dice

There are 2 dices.

One is a normal dice with faces marked from 1-6.

Other is blank.

Question: Fill the blank dice such that probability of sum of numbers (when the 2 dice are thrown simultaneously) is equal for sum=1, for sum=2 .... , for sum=12.

[Post your answers with explanation in the comments]

Image Credit: nucleuslearning.com

Picnic !!!

When they started off on the great annual picnic every wagon in town was pressed into service.

Half way to the picnic ground ten wagons broke down, so it was necessary for each of the remaining wagons to carry one more person.

When they started for home it was discovered that fifteen more wagons were out of commission, so on the return trip there were three persons more in each wagon than when they started out in the morning.

Question: Now who can tell how many people attended the great annual picnic?

[Post your answers with explanation in the comments]

Image Credit: strongfamilynews.com