Fresh Eggs?

If you boil some eggs, you want to know whether eggs you boiled were fresh ones. Simply break and peel the shell, if some white part of the egg is still attached to the shell, then this egg is a fresh one.

Tips: if you wanna peel boiled eggs and wanna get a perfect smooth surface of an egg, just after boiling, put eggs into cool water, wait until these eggs get cool, then you can easily peel them and get smooth surface of each egg.