Grid Puzzles

For each of the following grids, the object is to start on any square, visit every other square exactly once, and return to your starting place. From each square, you can only move to another square in the same row or column. From a square with a number, you must jump that many squares in some direction. From a square containing an arrow, you must jump some number of squares in that direction. Here's a solved example:

Each puzzle below has a unique solution.