Here is a mathematical expression that also secretly tells a movie name. What movie is that?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

What is the word or phrase?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?