Henry Ernest Dudeney/Modern Puzzles/166 - Picture Presentation

by : $166$

 * Picture Presentation
 * A wealthy collector had ten valuable pictures.
 * He proposed to make a presentation to a public gallery, but could not make up his mind as to how many he would give.
 * So it amused him to work out the exact number of different ways.
 * You see, he could give any one picture, any two, any three, and so on, or give the whole ten.


 * The reader may think it a long and troublesome calculation,
 * but I will give him a little rule that will enable him to get the answer in all such cases without any difficulty and only trivial labour.