Loss Due To Fake Currency Note?

A lady buys goods worth Rs. 200 from a shop. (shopkeeper is selling the goods with zero profit). The lady gives him Rs. 1000 note. The shopkeeper gets the change from the next shop and keeps Rs. 200 for himself and returns Rs. 800 to the lady. Later the shopkeeper of the next shop comes with the Rs. 1000 note saying "duplicate" and takes his money back.
 
How much LOSS did the shopkeeper face?

Find that LOSS here!

Source 

'Cashless' Transaction

What was the tricky? 

The shopkeeper's getting change for Rs.1000 from the next shop is just to confuse you.
He brought Rs.1000 from that shop & gave back Rs.1000. There is no loss or profit from that end. Now he gave genuine Rs.800 & product of Rs.200 to the lady. In return, he got Rs.0 as the Rs.1000 note offered by the lady was fake one. So total loss the shopkeeper faced is of Rs.1000. 

 

Same Issue Different Approaches

Two newly launched firms started manufacturing soaps in their production unit. After few day, both started facing the same issue. Few soap wrappers were remaining empty without soaps within those. Both manufacturers asked their employees to find solution on this. Employees of one firm did lot of research & developed a machine to detect the empty wrappers. For that they invested lot of time & money. While employees of competitor were smart & just brought one thing from the market & solved the problem.
What was that thing? 

Know here what did they bring? 

The Most Efficient Approach Matters

What was the issue? 

The employees of other firm were smart. They just brought table fan from the market. Now they put it in front of chain where soaps with wrappers are placed & moved for the packaging at last stage of production. Air flowing from fan started flowing away empty wrappers off the chain. In this way, they invented smart way to detect the empty wrappers. A simple solution that saved a lot of money & time! 

"Make The Line Shorter!"

Once a teacher asked student the question that Akbar once has asked to Birbal. Teacher drawn a line on a paper with pencil & posted paper on a board. He asked students to make the line shorter without erasing by eraser or extending it with pencil.

One of the student who knew that story of Akbar - Birbal came & just draws another bigger line ahead of previous line. Now the other line looked shorter.

   
Now teacher decides to trick the students. 'Now without touching any line it make left line longer & right line shorter', he asks further.

The student was smart & just rotated the paper upside down. That way, now left line looked longer & right one shorter!

Complex Time, Speed & Distance Maths

There is a circular race-track of diameter 1 km. Two cars A and B are standing on the track diametrically opposite to each other. They are both facing in the clockwise direction. At t=0, both cars start moving at a constant acceleration of 0.1 m/s/s (initial velocity zero). Since both of them are moving at same speed and acceleration and clockwise direction, they will always remain diametrically opposite to each other throughout their motion.

At the center of the race-track there is a bug. At t=0, the bug starts to fly towards car A. When it reaches car A, it turn around and starts moving towards car B. When it reaches B, it again turns back and starts moving towards car A. It keeps repeating the entire cycle. The speed of the bug is 1 m/s throughout.

After 1 hour, all 3 bodies stop moving. What is the total distance traveled by the bug?

Find out complex calculations here!

Simple Solution of Complex Problem

Here is that complex looking problem! 

Everything built, written or designed in the given problem is to distract you from basic physics formula.

Speed = Distance / Time

Hence,

Distance = Speed x Time 

All the details given except speed of bug & time for which it traveled are there to confuse you. Speed of bug is 1 m/s & it traveled for 1 hour = 3600 seconds.

Distance = 1 x 3600 = 3600 m

So the total distance traveled by the bug is 3600 m.

 

What was the neighbor's solution?

An old farmer died and left 17 cows to his three sons. In his will, the farmer stated that his oldest son should get 1/2, his middle son should get 1/3, and his youngest son should get 1/9 of all the cows. The sons, who did not want to end up with half cows, sat for days trying to figure out how many cows each of them should get.

One day, their neighbor came by to see how they were doing after their father's death. The three sons told him their problem. After thinking for a while, the neighbor said: "I'll be right back!" He went away, and when he came back, the three sons could divide the cows according to their father's will, and in such a way, that each of them got a whole number of cows.

What was the neighbor's solution? 

Here is that solution! 

Source

Neighbor's Solution on Old Farmer's Will

What was the problem with the will?

Neighbor went & brought a extra cow. Now there were 18 cows. The oldest son got 
1/2 x 18 = 9 cows, middle son got 1/3 x 18 = 6 cows and youngest son got 1/9 x 18 = 2 cows. In this way, total 9 + 6 + 2 = 17 cows distributed among 3 sons but left with 1 cow which neighbor took with himself. 

Do Not Tap on the Glass

A man works at an aquarium. Every day he spends a large chunk of his time trying to stop people from tapping on the glass at the shark tank. Finally, fed up with it, he comes up with a solution. The solution works perfectly, the next day no one taps on the glass. However, he is fired for it. 

What was the man’s solution?

Read here that solution! 

Source 

'Reward' For 'Creative' Solution

But what made to use some creativity? 

The man did just a little trick. He painted a crack on the glass. Now people visiting stopped tapping on the glass with fear that it would break. But in that attempt man made the aquarium to look terrible & unsafe! Hence fired!

 

Motivated Man in Depression

A man in depression decided to commit suicide. He started walking along a railway track when he spotted an express train speeding towards him. Suddenly he changes his mind & decides not to suicide. To avoid it, he jumped off the track, but before he jumped he ran ten feet towards the train. 

Why?

Why did he do so? Click here to know! 

Logical Move By Depressed Man

Why his life was in danger? 

Since the man was firm on his decision of ending his life he started to walk on a railway bridge. By doing that, he made sure no body would save him & even if he falls in river, the death is sure as he didn't know swimming. After crossing the bridge more than half way, he changed his mind. Now by running back wouldn't be feasible option as train was speeding towards him at greater speed. Only way to save life was cross the bridge before train hits him.

Hence he ran 10 feet towards the train & jumped off the track thereby to save his life.

Corrupt Servant Stealing The Gold

You have 10 bags of gold coins.You have appointed 1 servant to carry each bag. One of your servants who were responsible for transport of the money wanted to trick you. He took one of the bags and filed away one gram of gold from each coin. One coin normally weighs 10 grams.

Can you figure out in one scaling which bag contains lighter coins? Which servant should be fired? – using digital scales (shows the exact weight of an item)?

Trick to get down the culprit! 

Source

Master Plan for Gold Stealing Servant

Where story begins? 

We need to take coins from each of 10 bags to test.

Number all the servants & their respective bags from 1-10. Now take 1 coin from first bag, 2 coins from second bag, 3 coins from third bag & so on to 10 coins from tenth bag. Put all those on digital scale. In normal case, with no corruption it would weigh in the case as 55 x 10 = 550 gm. But coins from one of the bag weighs 1 gm less. So if it weighs 1 gm less then 1st coin that came from first bag is filed one & hence first servant is corrupt. If it weighs 548 gm then coins from second bag are reduced ones & hence second servant is corrupt.

Depending on how many gm less than 550 gm it weighs the bag with manipulated coins can be identified & respective servant can be fired.  

Fair Distribution of Assets

A man is the owner of a winery who recently passed away. In his will, he left 21 barrels (seven of which are filled with wine, seven of which are half full, and seven of which are empty) to his three sons. However, the wine and barrels must be split, so that each son has the same number of full barrels, the same number of half-full barrels, and the same number of empty barrels. 

Note that there are no measuring devices handy. How can the barrels and wine be evenly divided?

This is how it can be done?

Source

Fairly Distributed Assets

What was dilemma? 

We have to make number of each barrel type divisible by 3.

1.Two half-full barrels are poured into 1 empty barrel. So we left with 8 full, 5 half-empty & 8 empty barrels.

2.Again transfer two half-fulled barrels into 1 empty. Now we have 9 full, 3 half-empty & 9 empty barrels.

Now it can be evenly divided as 3 full, 1 half-empty & 3 empty barrels (hence wine) among 3 sons. 

Mislabeled Boxes of Marbles

Three closed boxes have either white marbles, black marbles or both and they are labeled white, black and both. However, you’re told that each of the labels are wrong. You may reach into one of the boxes and pull out only one marble. Which box should you remove a marble from to determine the contents of all three boxes? 

 Mislabeled !

Find here how it can be done!  

Source 

Correcting labels of Marble Boxes

How they were mislabeled? 

We should pick marble from a box labeled as 'Both'. Since it is incorrectly labeled it must content either all black or all white marbles.  After we know what it contains, we can identify the other 2 boxes by the process of elimination as below.

1. If the marble picked is BLACK, then obviously it is the box of black marbles. Two remaining boxes labelled as WHITE & BLACK are left. Since all labels are wrongly tagged the box tagged with WHITE must not be the box with all white marbles. It must contain both colors of marbles. And the one tagged as a BLACK must contain all white marbles.
 
Look at the figures below. In circle, labels are written & outside are the contents of the boxes. Arrows represents how the contents are rotated to make labels of the boxes wrong.

2. If the marble is WHITE, then obviously it is the box of white marbles. Two remaining boxes labelled as WHITE & BLACK are left. Since all labels are wrongly tagged the box tagged with BLACK must not be the box with all black marbles. It must contain both colors of marbles. And the one tagged as a WHITE must contain all BLACK marbles.

'The Wisest Son'

Once an old called his three sons. He gave them equal money and ask them to buy something that can fill their living room entirely. He told them that he will give all his money and property to the son who is able to do this task as asked.

The first son buys sticks and tries to fill the room but he falls short of sticks. The second son buys straw but he also falls short of filling the room. The third son buys only two things and he is able to fill the room completely and thus earns all the property and money.

What did he buy?

Here is what did he buy! 

Source 

The Wisest Son Deserves Rewards

What was the condition? 

The third son was very wise to choose his option (like you did while choosing to read this blog). There are two/three possible things that he might have bought.

1. He bought a candle & match box. Just ignited that candle in room & light filled in entire room.

2. He just bought perfume & sprayed in room. The smell of perfume occupied the entire room. 

 

 

Terrible Dream Leading To Death - Puzzle

Two brothers were watching a horror film on video late one night. One brother dozed off and dreamed that he was being chased by the crazy man from the movie, who was trying to kill him. In the dream, he hid in a cupboard. There was no sound except his heart pounding, and he had no idea where his crazed captor was. He was terrified! At that moment, the video finished, and his brother put his hand on the shoulder of his sleeping sibling to wake him. The shock at that tense moment was enough that the sleeping brother suffered a massive heart attack and died instantly. True or false?

Know here reality! 

Source 

Script Writer of Terrible Dream Story!

What was the incident? 

Just a little lateral thinking required to crack that puzzle.

If that brother was died immediately after his brother put hand on his shoulder then how who wrote about his dream in detail? Hence the incident of death due to massive heart attack is totally fake one! Only possible way to know anybody about died brother's dream is the died brother himself coming in his dream & tell the entire story of what happened on that night. 

What is The Password Trick?

A young man was standing outside a bar thinking to enter into bar. But there was a one problem. There was a guard standing in door asking password. Only those producing correct password allowed to enter. The young man stood there & started observing carefully. A man came to enter into bar. The guard said - twelve, the man answered six. Man allowed to enter. A lady came, guard said - six; she replied - three.The guard allowed her to enter.


Now thinking that he has cracked the trick of password generation the young man went to the guard. The guard said - ten, immediately the young man replied - five. But the guard denied his entry to the bar. Can you tell the reason? 

What's the password?

This was the trick! 

To Generate The Correct Password

Read here what happened? 

The trick for the password was different from that the young man was thinking. 

The password was the number of letters in the spelling of number that guard was saying.

TWELVE - SIX

SIX -THREE

Hence for TEN the password should have been THREE not half of TEN! 

This was the code language designed for the entry into the bar. 

The Man in The Photograph

A man is looking at a photograph of someone. His friend asks who it is.

The man replies, 'Brothers and sisters, I have none. But that man's father is my father's son'.
 
Who is in the photograph?

Know here the relationship between! 

Source 

Relation With The Man in Photograph

What was the incident? 

The person in photograph is the man's son. Since the man doesn't have any 

brothers or sisters, the statement my father's son is himself. A shortened 

version would be this man's father is myself; so he is the father of the man in

the picture.

Who Will Shout First?

4 criminals are caught and are to be punished. The Judge allows them to be freed if they can solve a puzzle. If they do not, they will be hung. They agreed.
The 4 criminals are lined up on some steps (shown in picture). They are all facing in the same direction. A wall separates the fourth man from the other three.
So to summarize :-

Man 1 can see men 2 and 3.

Man 2 can see man 3.

Man 3 can see none of the others.

Man 4 can see none of the others.

The criminals are wearing hats. They are told that there are two white hats and two black hats. The men initially don't know what color hat they are wearing. They are told to shout out the color of the hat that they are wearing as soon as they know for certain what color it is.

They are not allowed to turn round or move.

They are not allowed to talk to each other.

They are not allowed to take their hats off.

Who is the first person to shout out and why?

Who will shout first?

Know that person here! 

Source 

Chance of Knowing Color of Hat

Here is the given situation! 

Well, there are 2 possibilities of answer depending on what combination of hats Man 2 & Man 3 are wearing. One thing is sure Man 4 has least chance for getting what he is wearing. His crime must be the most serious one!

Case 1 : If Man 2 & Man 3 wearing same color of hat.

In this case, Man 1 would immediately come to know that he is wearing opposite color of hat & would shout out. In simple words, if Man 2 & Man 3 wearing WHITE (or BLACK) hats, then Man 1 & Man 4 must be wearing BLACK (or WHITE) hats. Since there is no chance for Man 4 to see Man 2 & Man 3 but Man 1 could see Man 2 & Man 3, he must be first to know color of hat he is wearing.


Case 2 : If Man 2 & Man 3 wearing hats of different color.

Now here Man 2 has to be very intelligent (like the reader as he has chosen to read this further). In this case, there is no way for Man 1 to come at any conclusion as there might be WHITE or BLACK hat on his head. After waiting for a while Man 2 has to apply some logic & should think this in his mind.

'Since Man 1 is not shouting he must be unsure with color of his hat. He would be sure only in case if I & Man 3 wearing same color of hats. Since he is unsure; the color of my hat must be opposite of Man 3's hat.' 

Now the judge if he is honest would put criminal with least serious crime at number 1 (or  & 2) same color (or different) hats on Man 2 & Man 3.  

 

A Most Unusual Paragraph

This is an unusual paragraph. I’m curious as to just how quickly you can find 
out what is so unusual about it. It looks so ordinary and plain that you would think nothing was wrong with it. In fact, nothing is wrong with it! It is highly unusual though. Study it and think about it, but you still may not find anything odd. But if you work at it a bit, you might find out. Try to do so without any coaching.

This is certainly unusual! 

Source 

This is The Unusual Thing!

What was the unusual? 

Well, you will not find anything wrong grammatically there neither you won't find any spelling mistake in entire paragraph. The letter 'e' is one of the most common letter used in English language. If you carefully observe the letter 'e' never appears in the paragraph.

The Ages of Three Daughters

I was visiting a friend one evening and remembered that he had three daughters. I asked him how old they were. “The product of their ages is 72,” he answered. Quizzically, I asked, “Is there anything else you can tell me?” “Yes,” he replied, “the sum of their ages is equal to the number of my house.” I stepped outside to see what the house number was. Upon returning inside, I said to my host, “I’m sorry, but I still can’t figure out their ages.” He responded apologetically, “I’m sorry, I forgot to mention that my oldest daughter likes strawberry shortcake.” With this information, I was able to determine all three of their ages. How old is each daughter?

How old they are? Click here! 

Source 

Calculation of The Ages of Three Daughters

How it was asked to find with some clues? 

The product of their age is 72; so possible combinations are,

3 x 3 x 8 = 72                       3 + 3 + 8 = 14

2 x 6 x 6 = 72                       2 + 6 + 6 = 14

2 x 2 x 18 = 72                     2 + 2 + 18 = 22

2 x 3 x 12 = 72                     2 + 3 + 12 = 17

2 x 4 x 9 = 72                       2 + 4 + 9 = 15

3 x 4 x 6 = 72                       3 + 4 + 6 = 13
 
If any of last 4 combinations was correct then I would have come to know ages of daughter straightaway as their sum is unique. So friend's house number as he must have told must be 14. That's why I was uncertain with the correct combination as they are appearing twice.

In next clue, he indirectly suggest he has only 1 oldest daughter. So 2,6,6 is eliminated as in that case he would have 2 oldest daughters.

So the correct combination is 3,3,8. That means he had oldest daughter of age 8 & younger twins.

250 Lbs Across The River?

Two boys weighing 50 pounds each and their older brother weighing 100 pounds wish to cross a river. Their boat will only hold 100 pounds.

How can they all cross the river in the boat?

Find here how they can! 

Source 

Taking 250 Lbs Across The River.

What was the challenge? 

1. First 2 boys of 50 pounds should cross the river.

2. One of them should bring back the boat at other end.

3. A boy with 100 pounds should carry himself across the river with boat.

4. Other boy of 50 pounds waiting across the river now should bring back the boat again.

5. Now both boys of 50 pounds now should cross the river. 

Which Door First?

While driving his car a man slams on the brakes when he sees, in the middle of the street, a diamond studded door, a gold door and a silver door. 

Which door does he open first?

Which door should I choose?

This should be first one! 

Source 

This Should Be First Door!

What's the situation? 

To open any other door he need to get out of the car & for that first he needs to open the door of the car.

"Thanks,You're Fired!"

A man is leaving on a business trip and stops by his office on the way to the airport. The night watchman stops him and says, "Sir, don't take that flight. I had a dream last night that your plane would crash and everyone would die!" The business man cancels his trip and sure enough, the plane crashes, killing all the passengers. The man gives his watchman a $10,000 reward for saving his life, then fires him. Why?

That's why! 

Source 

This Is Not Allowed On Duty

What exactly happened? 

The man awarded $10000 obviously for saving his life. The duty of night watchman is to keep watch on office at night not to sleep & dream.

That's why he fires the watchman.

Snail Up The Wall

A snail creeps 10 feet up a wall during the daytime, then falls asleep. It wakes up the next morning and discovers it slipped down 6 feet. If this happens each day, how many days will it take to reach the top of a 20 feet wall?

Escape to answer! 

Source 

A Snail On Top of The Wall !

Read the question first! 

Let's find out progress of snail day by day.

Day 1 : UP to 10, DOWN to 4

Day 2 : UP to 14, DOWN to 8

Day 3 : UP to 18, DOWN to 12

Day 4 : UP to 22 which is greater than 20.

So snail requires 4 days to reach the top of the wall.

The 500 Miles Race

Mike, Jimmy, Nader, Kevin and Larry were the top five finishers in the regional 500-mile race. They drove yellow, orange, green, red and blue cars but not necessarily in that order.

1. Neither Kevin nor Larry drove the green car.

2. Kevin finished faster than Mike and Larry.

3. The blue car finished earlier than Larry’s and Nader’s car.

4. The yellow car finished faster than the green car and the orange car.

5. Mike’s and Larry’s car finished ahead of the orange car.

6. Jimmy’s car finished before the blue and the yellow car.

Who drove what color car and what place did each driver finish?

To know that click here! 

Source 

Stats of The 500 Miles Race

Here is the scenario! 

Let's make a bit simple by putting clues into table. Rows representing owner while columns representing their cars. Now we need to use logical deduction by using all the clues & fill the table one by one. Finally, we get this.

Stats of The 500 Miles Race

 Filled circle represents rank of the particular car or participant. e.g. 1 circle means it's first, 2 means second & so on.

 

Losing Ten Minutes An Hour

A clock loses exactly ten minutes every hour. If the clock is set correctly at noon, what is the correct time when the clock reads 3:00pm?

Faulty Clock

Find it here!

Source 

Real Time Of a Faulty Clock

How much faulty it was? 

A clock loses 10 minutes in every hour that means for 60 real minutes it shows 50 minutes. In another words, real time is 60/50 = 1.2 times the minutes shown by the slower clock. It was set correctly at noon & at 3:00 PM ; 180 minutes of slower clock elapsed. That means the real time is 180 x 1.2 = 216. So it's 3:36 PM in real time clock!

Correct Time

'The Slowest Race' Brain Teaser

An Arab sheik is old and must will his fortune to one of his two sons. He makes a proposition. His two sons will ride their camels in a race, and whichever camel crosses the finish line LAST will win the fortune for its owner. During the race, the two brothers wander aimlessly for days, neither willing to cross the finish line.

In desperation, they ask a wise man for advice. He tells them something; then the brothers leap onto the camels and charge toward the finish line.

What did the wise man say?

This is what he said! 

Source