Challenge your brain with a game that is sure to sharpen your arithmetic skills. Play " El Mathador" Free - https://play.google.com/store/apps/details?id=com.HypnosisDigital.Axis . The demo version of the game game is also available for free for kindle, amazon fire phone & windows 8 phones. visit www.hypnosisdigital.com for more info. This is constructive gaming at its best. Please remember to rate the app - support your local indie developer with a mission to put educational gaming at the forefront of digital technologies.