Free Five-O Deluxe (iOS)

Instead of letters, the tiles are numbers, and instead of forming words, each sequence of tiles has to add up to a multiple of five, and no sequences may be longer than five tiles.

"This is a great must have iPad game. And I love the fact that it really works your mind muscles. It is a very simple game but it will get you hooked." - tcgeeks.com

"The price is right, and the game is fun as well as educational. I’d very much recommend it, especially if you’re looking for something the whole family can enjoy or even just for the kids." - ipadboardgames.org

Features:

Easy to learn rules
Online Multiplayer, take turns at your leisure
Pass-and-Play mode for up to 4 local players
Single player mode with challenging computer opponents
Hints for when you get stuck
Simple controls, just touch and drag the tiles to the board