What is always in front of you but can’t be seen?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

There is a place where if I stand up straight, I will still be considered sideways.

In the image below, can you find the value of an angle(y)

Replace the question mark with the correct number in below Picture:

What four weights can be used to balance from 1 to 30 pounds?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Who has married many women but was never married?