Pi approximation day is observed annually on which date?

1. 

Pi approximation day is observed annually on which date?
[A]. July 21
[B]. July 24
[C]. July 23
[D]. July 22

Answer: Option D

Explanation:

Pi approximation day is observed annually on July 22. It is dedicated to the mathematical constant pi (p). The day is also called Casual Pi Day. Pi denotes the relationship between a circle's circumference and its diameter and is denoted by the fraction 22/7 which calculates approximately to 3.14.

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