In a row of girls, Abi is 15th from the left and Suchi is 23rd from the right. If they interchange their positions, Abi becomes 18th from the left, then how many girls are there in the row?
There is something I don't understand about algebra: It has been around for thousands of years, yet no one has ever found out what the value of "x" or "y" really is.
Richard van der Merwe
When I fill, I am alone & a lot of haze in my life. I close myself in a room with a mathematics book. It fills a thrill in my mind..!