How to check the eggs?

Are These Eggs Fresh Or Not?

* For gating know that these eggs are fresh or not. First have a pot fill it with water and then put all eggs into the pot if there any egg is not fresh then it will start swimming and it will on the water.Rather then fresh egg will remain on surface of pot.

*Let the egg to the front of tube light or sun light and then carefully watch that is there any kind of spot in the egg if there is so this egg is not fresh.