What number when divided in half becomes zero?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Which is the correct shadow of the bird?