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

In a certain country ½ of 5 = 3. If the same proportion holds, what is the value of 1/3 of 10?

I am white when I am dirty, and black when I am clean. What am I?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Why is the longest human nose just 11 inches?

How many triangles do you see in the picture puzzle below?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Count the number of triangles in the given picture.