What's the only room from which no one can enter or leave

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Find out the number of circles in the given picture having Illusion

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

What kind of tree can you carry in your hand?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.