# $$20\times20$$ Lattice Paths, No Need For A Computer Right?

Starting in the top left corner of a $$2\times2$$ grid made out of single $$1\times1$$ squares, and only being able to move to the right and down, there are exactly 6 routes to the bottom right corner.

How many such routes are there in a $$20\times20$$ grid?

You may use a calculator for the final step of your calculation.

Hint: Pascal's triangle.

×

Problem Loading...

Note Loading...

Set Loading...