Numbers Are Odd is a very simple game but it can be very addictive. The rules are simple: drag numbers from the bottom of the screen to empty game fields. You have to arrange numbers so that the horizontal sum of numbers between two puzzle posts matches the upper-right number on left puzzle post and the vertical sum of numbers matches the lower-left number on top puzzle post. Numbers between two posts, horizontal or vertical, are unique so you will not get a sequence of numbers like 3 3 5 or 3 5 3.
This game is meant to be played in a couple minutes that you can spare here and there and it is not meant to be frustrating. There is no time limits and no time or score keeping at all.