Fill a bowl with cold water and put the eggs. If fresh they will sink to bottom. If they float you should not eat them
If the yolk is flat and breaks easily, the egg is old. Look at the color of the egg white. A cloudy white indicates a very fresh egg. A clear white means the egg is older but still edible
Put the eggs in a bowl of water. If they sink down they're okay. If they are in middle they're perfect If they float, they're old.