Pi Approximation Day

Dear Readers,

Do you know what’s special about today,   22 July? 
Well, today is Pi Approximation Day.

Pi Approximation Day celebrates the mathematical constant π (pi). It is observed on July 22, due to π being roughly equal to 22/7.

The fractional approximation of π ,²²⁄₇, resembles the date July 22 in the day/month format, where it is written 22/7. Pi Approximation Day is therefore celebrated on July 22.

In geometry, pi is defined as the ratio of a circle's circumference to its diameter. July 22, often written as 22/7, is an appropriate day to explore pi, since 22 divided by 7 is an approximation of pi.

Pi Approximation Day is celebrated in a number of ways, including contests to memorize pi to the most decimal places, solving math problems involving pi, discovering the history of pi, ruminating on how life would be different without pi and—of course—eating pie.
At my school, a competition 'Math's Wizard' was held today for classes VI - XII. It was a 30 minute one word answer test. Here are the question papers of different classes:

VI CLASS

VII CLASS

VIII CLASS

IX CLASS

X CLASS

XI CLASS

XII CLASS

So, enjoy this mathematical day ...

Amit Sir