why number 8549176320 is one of a kind?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

Why is the Hole below a Lock?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

No matter how little or how much you use me, you change me every month. What am I?

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

Can you count the number of quadrilaterals in the picture below?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.