The 3-jug riddle

You have a full 12-litre jug and empty 5 and 8-litre jugs. Can you measure exactly 6 litres? This problem dates to 1484 and was posed in the context of a milkman making a home delivery to a customer. The story goes this riddle so delighted Simeon Denis Poisson as a young boy that it…

The Pizza Theorem

Surely you have found yourself in a situation in which you are sharing a pizza with other people and cutting it asymmetrically; how do you know if you are eating more, less or the same amount as everyone else? To answer this question, we can count on the help of two American mathematicians: Rick Mabry…

The Pizza Equation

Most of us tend to order a pizza based on the amount we plan to eat—and there’s nothing wrong with that—but if you’re trying to make your dollar stretch as far as it can, your best bet is to just order the biggest one you can buy. Why? The increase in size to cost always…

India’s Human Computer

Ever heard of a Human Computer? Shakuntala Devi, an Indian writer, mental calculator and Guinness Book record holder is popularly called ‘The Human Computer’. Shakuntala Devi was born in Bengaluru, Karnataka and died there itself at the age of 83. She earned her place in the 1982 edition of the Guinness Book of World Records…