Can you convert the number zero(0) into a positive number using just one mathematical operator ?

There was a strange boy who was born before his father. How can this be possible?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

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?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What do you answer even though it never asks you questions?