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The digits 0-9(0,1,2,3,4,5,6,7,8,9) can be rearranged into 3628800 distinct 10 digits numbers.

How many of these numbers are prime ?

How many of these numbers are prime ?

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There is uniqueness between these five names

Nell Edna swati itaws and Ellen.

what uniqueness am i talking about ?

Nell Edna swati itaws and Ellen.

what uniqueness am i talking about ?

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A teacher is told that the principal of the school will be inspecting his class on the next day. Now, the teacher is worried for the impression that his class might cast on the principal since all the students are not intelligent. Also, the principal can ask questions from anywhere. However, he will have the power to choose any student for answering the question.

Now he wants that the principal must be impressed with the performance of his class. What will he do to maximize the final impression on the principal ?

Now he wants that the principal must be impressed with the performance of his class. What will he do to maximize the final impression on the principal ?

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In a jar, there are some orange candies and some strawberry candies. You pick up two candies at a time randomly. If the two candies are of same flavor, you throw them away and put a strawberry candy inside. If they are of opposite flavors, you throw them away and put an orange candy inside.

In such manner, you will be reducing the candies in the jar one at a time and will eventually be left with only one candy in the jar.

If you are told about the respective number of orange and strawberry candies at the outset, will it be feasible for you to predict the flavor of the final remaining candy ?
**category** :
LOGIC

In such manner, you will be reducing the candies in the jar one at a time and will eventually be left with only one candy in the jar.

If you are told about the respective number of orange and strawberry candies at the outset, will it be feasible for you to predict the flavor of the final remaining candy ?

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There are 100 doors. 100 strangers have been gathered in the adjacent room. The first one goes and opens every door. The second one goes and shuts down all the even numbered doors – second, fourth, sixth... and so on. The third one goes and reverses the current position of every third door (third, sixth, ninth… and so on.) i.e. if the door is open, he shuts it and if the door is shut, he switches opens it. All the 100 strangers progresses in the similar fashion.

After the last person has done what he wanted, which doors will be left open and which ones will be shut at the end?
**category** :
LOGIC

After the last person has done what he wanted, which doors will be left open and which ones will be shut at the end?

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Indian jones went to Andaman(India) for the holiday where he came to know that there is a big treasure hidden here. The Map of the treasure is hidden somewhere in the cellular jail.

The Map location is hidden in the cipher below.

"roolF mooR gnignaH ehT edisnI neddiH sI paM erusaerT"

What is the map location?

The Map location is hidden in the cipher below.

"roolF mooR gnignaH ehT edisnI neddiH sI paM erusaerT"

What is the map location?

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This is a classic chess puzzle and considered to be one of the hardest puzzles in history.

As shown in the picture below, White army is arranged in a classic chess board. You need to add black army i.e

1 king

1 queen

2 rooks

2 bishops

2 knights

8 pawns

in such a way that not a single piece of either color is under attack.

**category** :
PICTURE

As shown in the picture below, White army is arranged in a classic chess board. You need to add black army i.e

1 king

1 queen

2 rooks

2 bishops

2 knights

8 pawns

in such a way that not a single piece of either color is under attack.

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My town contains 100 buildings.

They are numbered from 1 to 100. How many 6's are used in these numbers ?

**category** :
LOGIC

They are numbered from 1 to 100. How many 6's are used in these numbers ?

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