- The dollar was established as the official currency of the US in 1785.
- The number Pi (the ratio of the circumference to the diameter of a circle) can't be expressed as a fraction, making it an irrational number. It never repeats and never ends when written as a decimal..
- A pip is one of the spots on die or domino.
- Cats spend 66% of their life asleep.
- Only female mosquitoes bite.
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