How to test Eggs freshness

Take a bowl full of water the level of water shoul be 1 inch above the eggs standing length.
Now immerse the eggs in it.
1. If the Eggs float on the surface. You can trash the eggs.
Note: Eating spoiled eggs causes nausea, vomitings and even food poison which are noticed only after 72 hours.
2. If the egg stands straight then they should be used immediatly
3. If the egg settles down horizontally. than they are fresh.

Note: Eggs can be used for couple of weeks even after the expiration date. But please check the condition before using at the same time this test is accurate but not exact.