What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

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?

Look at the picture and find out which square is not linked with any of the other squares.