A person borrows Rs. 29000 each from 2 lenders for 7 years at 6.75% p.a. simple interest. He immediately lends both the sums to another person at 11.25 p.a for 7 years. Find his gain in the transaction per year.
Pure mathematics is the world's best game. It is more absorbing than chess, more of a gamble than poker, and lasts longer than Monopoly. It's free. It can be played anywhere - Archimedes did it in a bathtub.
Richard J. Trudeau, Dots and Lines
A man has one hundred dollars and you leave him with two dollars. That's subtraction.