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20Apr/106

3 Men and 5 Hats – Brainteaser

Interesting Brainteaser

3 innocent prisoners were sitting in a jail. One day, the cruel jailer takes them out and places them in a line on three chairs, in such a way that man C can see both man A and man B, man B can see only man A, and man A can see none of the other men.

The jailer shows them 5 hats, 2 of which are black and 3 of which are white. After this, he blindfolds the men, places one hat on each of their heads, and removes the blindfolds again. The jailer tells his three prisoners that if one of them is able to determine the color of his hat within one minute, all of them are released. Otherwise, they will all be executed. None of the prisoners can see his own hat, and all are intelligent. After 59 seconds, man A shouts out the (correct) color of his hat!

What is the color of man A's hat, and how does he know?

Popularity: 31%

Filed under: Puzzles 6 Comments
24Mar/107

Most Difficult Riddle: Einstein Riddle

Most Difficult Riddle: One of my friend have forwarded me this mentioning the background. It claims that this mathematical puzzle was created by Einstein. Though we don't vouch for this claim but in any case it is very interesting to solve this. So guys go ahead and solve. We are ready to give the solutions too, if you all fail to solve it. But hope that's not the case. All the best!

Albert Einstein created this riddle in the late 1800s, and claimed that 98% of the world population couldn't solve it. It is a good brain exercise. Here it is:

- In a street there are five houses, painted five different colors.

- In each house lives a person of different nationality.

- These five homeowners each drink a different kind of beverage, smoke different brand of cigar and keep a different pet.

Einstein's riddle is: Who owns the fish?

Popularity: 33%

Filed under: Competitive Exam Prep Continue reading
22Mar/1010

Math Riddles

Math Riddle - 1

A 26" x 26" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 27 nails on each side of the square. Each nail is at the same distance from the neighboring nails. How many nails does the carpenter use?

What if the metal plate is in the shape of a regular polygon (e.g., pentagon, hexagon, heptagon, octagon, etc.)? Try generalizing the above result to the case of a regular polygon.

Math Riddle - 2

A painting job can be completed by 5 painters in 37 days. If 10 more painters join the team 7 days after starting work on the job, then how many more days are required to complete the job?

The number of days for the job is inversely proportional to the number of painters. So, is 'number of days × number of painters = constant'?

What assumptions were made to arrive at the solution?
Is something assumed about the output of the painters?

Popularity: 17%

Filed under: Puzzles 10 Comments
12Mar/100

Squaring Puzzles

Squaring Puzzles- Find below 2 interesting puzzles related to square of some number. Hope you will like them.

Puzzle 1

The square of 13 is 169.  Take the last digit of the square, 9, and place it in the middle, making 196.  This is the square of 14, the next number above 13. 

Popularity: 20%

Filed under: Puzzles Continue reading
3Mar/104

Fruit Seller’s Paradox

Fruit Seller's Paradox- Each of two apple women had 30 apples for sale. The first sold hers at the rate of 2 for a nickel, the second at the rate of 3 for a nickel. At the end of the day their respective receipts were 75 cents and 50 cents, or $1.25 in all.

Paradox

Popularity: 15%

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22Feb/1013

Mathematical Puzzle for Competitive Exams

Mathematical Puzzle for competitive examinations- Friends this is a maths puzzle. Solving this type of maths puzzle could be very useful for students taking competitive examinations like CAT, GMAT, etc. Please let me clarify the puzzle is complete and no information in missing. For more such puzzle keep checking back WWW.QUICKERMATHS.COM

Mathematics Age Puzzle

At a census there is the following dialog:

Field helper: number of children?

Popularity: 47%

Filed under: Competitive Exam Prep, Puzzles Continue reading
21Feb/102

Windy Flight Paradox

A plane makes a trip from New York to Washington and back to New York. Call the distance between the two cities 200 miles and the speed of the plane 100 miles per hour. Then the time required for the round trip, ignoring stops, is 4 hours. Now suppose there is a strong wind which blows throughout the entire trip with the same speed and in the same direction-from New York directly toward Washington, say.

Popularity: 15%

Filed under: Puzzles Continue reading
20Feb/104

Puzzling Puzzle

Who should be the Boss?

A large business firm was once planning to open a new branch in a certain city, and advertised positions for three clerks. Out of a number of applicants the personnel manager selected three promising young men and addressed them in the following way : "Your salaries are to begin at the rate of $1000 per year, to be paid every half-year. If your work is satisfactory, and we keep you, your salaries will be raised.

Which would you prefer, a raise of $150 per year or a raise of $50 every half-year?"

Popularity: 2%

Filed under: Puzzles Continue reading
2Feb/107

Weight Puzzles

Sample Puzzles

Find below couple of weights and balance scale related puzzle questions. We are also mentioning the difficult level as per our perception. Our opinion may differ from yours.

Weight Puzzle Number 1

Here is a puzzle question of average (2/5; 5/5 is most difficult) difficulty level -

Among 12 identical looking golf balls there is one that is defective in weight. It is either heavier or lighter than the standard one. You have a balance Scale. You can only weigh 3 times to find

Popularity: 7%

Filed under: Puzzles Continue reading
2Feb/104

Strange Examination!

Strange Puzzle - Strange Brainteaser

Once a professor was teaching mathematics in a college. He declared that, all the students who will score equal to more than the class average in his subject in the upcoming semester examination will be marked as PASS. Those who will score lesser than average will be marked as FAIL.

Actually the teacher was trying to infuse

Popularity: 3%

Filed under: Puzzles Continue reading
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