Its not a hard Mathematical question, it can be solved in few minutes, so did I. But I couldn't figure out proper equation and procedure to solve. could you help me out with it?
A father gave his son Rs 20 and asked him to get three things; books that cost Rs 5 each, notebooks that cost Re 1 each and pencils that costs 25p each. He also told him that he will be rewarded if total number of books, notebooks and pencils will be 20 too.
I would appreciate if you could post all procedure to work it out.