**Other**
* Number of years in a decade
* Number of days in a month
* Number of hours in a day
* Number of minutes in an hour
* Number of seconds in a minute
* Number of degrees in a circle
* Number of states in the United States
* Number of provinces in Canada
* Number of countries in the world
* Number of planets in the solar system
* Number of stars in the Milky Way
* Number of galaxies in the universe
* Number of people on Earth
* Number of animals on Earth
* Number of plants on Earth
* Number of insects on Earth
* Number of bacteria on Earth
* Number of viruses on Earth
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