The figure below shows points X, Y and Z on rectangular grid drawn in green. Starting on X, how may paths are to reach Y under the restriction that you can go right and/or up. How many ways are there to go from X to Z under the same restrictions. If the restriction is changed so that you can move up and/or to the left, how many ways or there to go from X to Y?
TJ test prep practice problems for our students and readers. The problems provide a very small sampling of what Optimal TJ Prep students work with.