Mind Teasers : 10th Class Science Riddle

Difficulty Popularity

What is
black when you buy it,
red when you use it,
and gray when you throw it away ?
category : SCIENCE | RIDDLE

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Mind Teasers : Interview Marble Logic Puzzle

Difficulty Popularity

You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other.
The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.
category : LOGIC

Mind Teasers : Terrorist Attack Security Puzzle

Difficulty Popularity

UNO plans a gathering.
However there is threat of terrorist attack. So security guard who is a mathematical plans somethings to secure the place.

A terrorist stands nearby the door where
1st ambassador comes , the security guard said 'twelve' and ambassador replied with 'six'.
2nd ambassador comes , the security guard said 'six' and ambassador replied with 'three'.

The terrorist thinks its enough and walks to the door.
The security person said 'eight' , terrorist replied 'four' and get immediately arrested.

why ?
category : LOGIC | TRICK

Mind Teasers : Suicide Mystery Riddle

Difficulty Popularity

A man 5'11" high is found dead in an closed room.
This room is found empty with some puddle of water.

The man was died by hanging himself to a 12 feet high fan.
How did the man die ?

category : LOGIC | MYSTERY

Mind Teasers : The problem of the family of Amazon

Difficulty Popularity

While walking through the deepest jungle of the amazon, Steve the explorer came across a mystical tomb. He went closer and it read:
"Here lies two faithful husbands, with their two faithful wives,
Here lies two grandmothers along with their two granddaughters,
Here lies two dad's along with their two beloved daughters,
Here lies two mothers along with their two lovely sons,
Here lies two maidens along with their two charming mothers,
Here lies two sisters along with their two amazing brothers.
All were born legitimate, with no incest."
Steve, then checked and saw that there were only 6 graves in total

How was this possible? Steve needs your help to figure it out.

Mind Teasers : Ten From Nine Toothpicks Trick Riddle

Difficulty Popularity

If you were asked to pick nine toothpicks and make them ten without breaking any of them, how will you do it?

Mind Teasers : Intel Logical Interview Problem

Difficulty Popularity

Chanu bought an ice cream cone having 5 different flavor scoop.
The five flavors in random order are Jamaica, nutty-chocolate, peppermint, walnut and orange

These are some hints to help identify the puzzled reader to determine the order of flavor from top to bottom.
1. The bottom flavor of the cone has 7 letters.
2. The walnut scoop is at between Jamaica and the nutty-chocolate scoop.
3. walnut is above the orange scoop but below the nutty-chocolate scoop.

So can you figure out the flavor of ice cream in order from top to bottom?

category : LOGIC

Mind Teasers : Famous Water Jug Problem

Difficulty Popularity

You live in Dubai and had an infinite supply of oil and a 5 liters and 3 liters jar,
how would you measure exactly 4 liters (of-course in minimum numbers of step) ?
category : LOGIC | MEASURE

Mind Teasers : Dollar * 4 = Quarter Equation Riddle

Difficulty Popularity

A quarter is 1/4th of a dollar but Professor Mr.GPuzzles has reversed the equation as below :

DOLLAR * 4 = QUARTER

You need to replace each alphabet by a number to decipher the logic used by Professor to make above equation true.
category : MATHS | EQUATION

Mind Teasers : The Girl Riddle

Difficulty Popularity

You see a beautiful girl sitting. You can't sit on her place even if she standup and the leave the place.

Where is she sitting?

category : LOGIC | TRICK

Mind Teasers : Trick Interesting Maths puzzle

Difficulty Popularity

There are three cars in a racing track. The track is made forming a perfect circle and is quite wide so that at one time, multiple cars can pass through it. The car which is leading is driving at 55 MPH and the slowest car is driving at 45 MPH. The car that is in middle of these two is driving in between the two speeds. For the time being you can say that the distance between the fastest car and the middle car is x miles and it is same between the middle car and the slowest car. Also, x is not equal to 0 or 1.

The car keeps running till the leading car catches up with the slowest car and then every car stops. Given the case, do you think that at any point, the distance between any two pairs will again become x miles?

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