Question

How many houses have an area less than 100 m² ?

Answer 1

its 4

Explanation:

I just did it on Khan

Answer 2

This question overall depends on a continuously changing factor.

Explanation:

There are many houses in this world that have an area of less than 100
`m^2`, while many others have up to 700, 800, or even 1000
`m^2` of land. Your question is impossible to calculate because of the massive amount of houses in this world. If you want a good estimate, say around 0.9 to 1.8 billion.