## Problem of the Day #156: Dr. Kim’s Solar Cells, Part 2
*August 22, 2011*

*Posted by Sreenath in : potd , trackback*

Dr. Kim has recently ordered a shipment of ten very expensive solar cells. As the cells arrive one at a time, Dr. Kim places them in a stack on his desk (with the last one received on the top). Izzy occasionally walks in, trips, and smashes the solar cell on the top of the stack. Given that she has already smashed the fifth solar cell Dr. Kim received, in how many ways can Izzy smash the remaining cells?

## Comments»

trick question, izzy can find infinitely many ways to smash solar cells.