How much can you visualize? Can you imagine the mirror image of a given object, or the best way to connect a series of geometrical shapes? How might you figure out the shortest distance between any two points, the number of salami slices that fit on a pizza, or the amount of coffee a pot can hold? These tricky puzzlers will test your ability to do these things and more, and help you develop this valuable mental skill. Here are all kinds of grids,...