It states that an egg is fresh if it sinks and rests flat in a bowl of water; older eggs float or stand erect.
Gently shake the egg near your ear; if you hear any splashing, it's not fresh.
A fresh egg has thick whites and a solid, spherical yolk. Crack the egg onto a dish to examine.
Spoiled eggs smell strongly of sulfur, but fresh eggs barely smell at all.
To make sure your eggs are still fresh, always check the carton's best-before date.