How to Become a Walking Human Calculator?
Remember your teacher asking you, ‘Tell me, what is the square of 85?’ in your math class? Did you panic with fear because you don’t know the answer and others would laugh?
You kept thinking, struggling hard to remember the squares you memorized the night before. But all your efforts went in vain. In the end, you could not remember the square of 85 and got a bad remark.