how old is 450

3 hours ago 3
Nature

The concept of "0" or zero as a number has no age in the sense of a living being; it is a mathematical concept representing an empty quantity or the absence of any countable items. As a concept, zero has been around for thousands of years, with some of the earliest documented uses dating back over 2,000 years. The symbol and use of zero in the decimal number system was developed in ancient India around the 5th century CE and spread to other cultures from there. It marks the "starting point" or origin in many mathematical and chronological contexts rather than having an age of its own.

If intended as "how old is year zero," it's noteworthy that historians traditionally do not recognize a year zero in historic BC/AD dating; the calendar goes directly from 1 BC to AD 1. However, some calendar systems and astronomers use a year zero for calculative convenience, which is treated as the year preceding AD 1.

In summary, zero is a timeless mathematical concept rather than an entity with age, and its cultural and historical origins trace back around 1,500 to 2,000 years or more in recorded history.