I travel all around the world but always stay in the corner. What am I?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

What does a man do only once in his lifetime, but women do once a year after they are 29?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What number when divided in half becomes zero?

why number 8549176320 is one of a kind?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Why is a river so rich ?