YoKejriwalSoHonest Puzzle

#217

Once Anna Hazare and Arvind Kejriwal was fighting on a issue and then they agreed to finish the issue by tossing a coin. But then YoKejriwalSoHonest tossed the coin until he got HEAD as a result.
After some time, what should be the proportion of HEADS to TAILS ? (Assuming probability of having a HEAD or a TAIL is the same)

  Difficulty Level - 3/5

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  Solution : 

  Will be updated in a day.
  

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Bricks Puzzle

#213

Three workers; Tom, Dick and Harry were laying a brick wall.

Tom can lay 1000 bricks in three hours, Dick can lay 1000 bricks in two hours and Harry can lay 1000 bricks in six hours.

How long will it take Tom, Dick and Harry to lay 1000 bricks if they all work together?

  Difficulty Level - 2/5

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  Solution : 

  In 6 Hours, Tom can lay 2000 bricks, Dick can lay 3000 bricks and Harry can lay 1000 bricks; a total of 6000 bricks. 
So, in 1 Hour, they can lay 1000 bricks.
 

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Bricks Puzzle - Hint

#213

Three workers; Tom, Dick and Harry were laying a brick wall.

Tom can lay 1000 bricks in three hours, Dick can lay 1000 bricks in two hours and Harry can lay 1000 bricks in six hours.

How long will it take Tom, Dick and Harry to lay 1000 bricks if they all work together?

  Difficulty Level - 2/5

  Update Your Answers : Click Here

  Hint : 

  How many bricks can they lay in an hour ??
  

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Easy Maths

#207

What will be your answer if I will ask you a mathematics question :
Half of 6+6?

  Difficulty Level - 1/5

  Solution : 

   9 (half of 6 is 3 which should be solved first according to PEMDAS or BODMAS)
  

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Easy Maths - Hint

#207

What will be your answer if I will ask you a mathematics question :
Half of 6+6?
  Difficulty Level - 1/5

  Hint : 

  BODMAS.
  

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Club Riddle

#201

A man wanted to enter an exclusive club but did not know the password that was required. He waited by the door and listened. A club member knocked on the door and the doorman said "twelve." The member replied "six” and was let in. A second member came to the door and the doorman said "three." The member replied "five" and was let in. A third member came to the door and the doorman said "six." The member replied "nine" and was let in. The man thought he had heard enough and walked up to the door. The doorman said "five" and the man replied "four." but he was not let in. What must be the reply, so that the man can let in?

  Difficulty Level - 4/5

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  Solution : 

  He must reply 6. (Five has 4 letters >> Square of 4 is 16 >> The doorman wants the last digit only. )
  

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Club Riddle - Hint

#201

A man wanted to enter an exclusive club but did not know the password that was required. He waited by the door and listened. A club member knocked on the door and the doorman said "twelve." The member replied "six” and was let in. A second member came to the door and the doorman said "three." The member replied "five" and was let in. A third member came to the door and the doorman said "six." The member replied "nine" and was let in. The man thought he had heard enough and walked up to the door. The doorman said "five" and the man replied "four." but he was not let in. What must be the reply, so that the man can let in?

  Difficulty Level - 4/5

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  Hint : 

  Play with numbers.
 

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Bank Puzzle

#198

A Man took a loan amount of Rs. 12921(Palindrome) from the Bank, after 1 month he decided to return the whole amount with 1 month Interest to the Bank.

What must be the Interest Charged by the Bank to this amount to make it to the nearest Palindrome?

  Difficulty Level - 1/5

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  Solution : 

  Palindrome next to 12921 is 13031. So, Interest Charged is Rs.110. 

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Children Crawling Puzzle

#196

Two children were sitting on the floor. 1st child was at one corner of the floor(Point A) and other child is on the opposite corner of the floor(Point B). Both of them started crawling to approach each other but by different speeds. In between, they meet at point X and pass each other. After their meeting at point X, 1st child took 40 seconds to reach at point B and the other child took only 10 seconds to reach at point A.
Can you find out the total time each of them took to change their positions?

  Difficulty Level - 3/5

   
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  Solution :

Assume that "a" is the speed of 1st Child  and "b" is the speed of other child.
Let "t" be the number of seconds it takes them to meet at point "X". 
Using Distance = Speed * Time
>>> For 1st Child
Distance = a * t before meeting
And 
Distance = a * 40 after meeting

>>> For other child
Distance = b * t before meeting
And
Distance = b * 10 after meeting
Now the distance travelled by 1st child before meeting is equal to the distance travelled by the other child after meeting and vice versa.
Thus
a * t = b * 10 And b * t = a * 40 
>>> a * t = (a * 40)/t * 10
>>> t^2 = 400
>>> t = 20
Thus 1st Child requires 20 + 40 = 60 seconds,
Whereas the other Child requires 20 + 10 = 30 seconds to change the position..
 

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Children Crawling Puzzle - Hint

#196

Two children were sitting on the floor. 1st child was at one corner of the floor(Point A) and other child is on the opposite corner of the floor(Point B). Both of them started crawling to approach each other but by different speeds. In between, they meet at point X and pass each other. After their meeting at point X, 1st child took 40 seconds to reach at point B and the other child took only 10 seconds to reach at point A.
Can you find out the total time each of them took to change their positions?

  Difficulty Level - 3/5

  Update Your Answers : Click Here

  Hint : 

  Distance, Speed and Time.

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Confusing Probability Puzzle

#192

There are two juveniles in Mr.Sharma's family. At least one juvenile is a boy. What is the probability that both of the juveniles are boys?

Also, there are two juveniles in Mr.Verma's family. The older juvenile is a girl. What is the probability that both of the juveniles are girls? 

  Difficulty Level - 3/5

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  Solution : 

  1/3 and 1/2 >>>>>>
Since there are two juveniles in Mr.Sharma's family, at least one of which is a boy, there are three equally probable cases: Boy-Boy, Boy-Girl or Girl-Boy. In only one case, both juveniles are boys, so the probability that both are boys is 1/3.
Mr.Verma's family situation is different. Knowing that the older juvenile is a girl, there are only two equally probable cases: 
Girl-Girl or Girl-Boy. Therefore the probability that both juveniles are girls is 1/2 . 

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Confusing Probability Puzzle - Hint

#192

There are two juveniles in Mr.Sharma's family. At least one juvenile is a boy. What is the probability that both of the juveniles are boys?

Also, there are two juveniles in Mr.Verma's family. The older juvenile is a girl. What is the probability that both of the juveniles are girls? 

  Difficulty Level - 3/5

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  Hint : 

  These are two different cases.
  

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Easy Maths Puzzle

#191

Finally a very easy puzzle for you all....

  Difficulty Level - 2/5

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  Solution : 

   75. Applying PEDMAS/BODMAS, you get the equation as (15/5)*5*5 = 75
  

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Easy Maths Puzzle - Hint

#191

Finally a very easy puzzle for you all....

  Difficulty Level - 2/5

  Update Your Answers : Click Here

  Hint : 

  PEDMAS or BODMAS.
  

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House Number Problem

#182

Amitabh Bachchan (Vicky Babu) was searching the house of Jaya Prada(Meena) who lives in a long street.
Vicky knew that there are more than 50 houses in that side of the street but no more than 500 houses.
Also, the numbers on the one side of Meena's House add up to exactly the same as all the numbers on the other side of Meena's House.
Can Vicky find the Meena's House Number without singing the famous song ---> "Meena aa gya tera deewana" ? 

  Difficulty Level - 5/5

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  Solution : 

   House Number 204 among 288 houses on one side of street.
  

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House Number Problem - Hint

#182

Amitabh Bachchan (Vicky Babu) was searching the house of Jaya Prada(Meena) who lives in a long street.
Vicky knew that there are more than 50 houses in that side of the street but no more than 500 houses.
Also, the numbers on the one side of Meena's House add up to exactly the same as all the numbers on the other side of Meena's House.
Can Vicky find the Meena's House Number without singing the famous song ---> "Meena aa gya tera deewana" ? 

  Difficulty Level - 5/5

  Update Your Answers : Click Here

  Hint : 

   There can be numbers like 1 (no house on each side), number 6 with 8 houses in the street (sum = 15 on both sides) and so on.
  

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Interesting Date Game

#181

An interesting date to reckon is 7.7.49 meaning July 7, 1949 as in this date the product of the first two numbers is equal to the last number.
The game is to find the dates of this kind in the 20th century...
The one who finds the year(in 20th century) in which there are maximum dates of this kind will win....
The game begins now..

  Difficulty Level - 4/5

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  Solution : 

   1924. >>>> 7 such dates possible. 
   >>>> 1.24.24 , 2.12.24, 3.8.24, 4.6.24, 6.4.24, 8.3.24, 12.2.24 
   >>>> In 36, 48, 60 and 72 only 6 such dates possible. 
  

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Interesting Date Game - Hint

#181

An interesting date to reckon is 7.7.49 meaning July 7, 1949 as in this date the product of the first two numbers is equal to the last number.
The game is to find the dates of this kind in the 20th century...
The one who finds the year(in 20th century) in which there are maximum dates of this kind will win....
The game begins now..

  Difficulty Level - 4/5

  Update Your Answers : Click Here

  Hint : 

   You can find the divisors.
  

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Virus Attack Puzzle

#180

Mickey Virus is taking revenge on his enemies.
He is uploading virus in such a way that the goons' systems virus content double itself in an hour. His enemies system crashes at the 9th hour. 
Can you identify when was the system memory half infected with the virus ?

  Difficulty Level - 1/5

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  Solution : 

   Will be updated in a day.
  

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School Kids Maths Puzzle

#175

Find the value of "a" 

  Difficulty Level - 1/5

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  Solution : 

   28 >>> [(4+3) * 4]
  

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