National Mathematics Day in India
National Mathematics Day in India is held on December 22. This event in the third decade of the month December is annual. 
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Most mathematical symbols weren't invented until the 16th century. The word “hundred” comes from the old Norse term, “hundrath”, which actually means 120 and not 100. Pi and pizzas are linked. You multiply Pi multiplied by the radius squared to find the area and multiply area by height to find the volume, That means the volume of a pizza that has a nominal radius of (z) and height (a) will, of course, be: Pi × z × z × a. The universe isn't big enough for Googolplex.
National Mathematics Day is celebrated on December 22 to commemorate the birth anniversary of great mathematician Srinivasa Ramanujan. Srinivasa Ramanujan was born on 22 December 1887, Erode, Tamil Nadu, India, into a Brahmin family. His father was Srinivasa Iyengar, an accounting clerk for a clothing merchant, and his mother was Komalatammal. When Ramanujan was 15 years old, he obtained a copy of George Shoobridge Carr’s Synopsis of Elementary Results in Pure and Applied Mathematics. This book was his main source of inspiration and expertise. He published the first of his papers in the Journal of the Indian Mathematical Society in 1911.
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