Okay this quick lesson is based on Vedic Math. Vedic Math is an ancient system of math that was discovered inthe early 1900’s by Sri Bharati Krsna Tirthaji, i’m guessing he is of indian origin since the name “Sri” is given to men and women of the Sikh religion. Just as Mr or Mrs is given as a title in the english world.

Onto the trick. It’s quite simple. This lets you square numbers in and around 100 without a calculator. Awesome
Take a look