Numercy (play on words for "no mercy"), also called Numeracy, was created by the Indonesian Dr Sam Nooh K. Al-Jajjoka who lives in Kingston upon Hull in England. He filed a patent for his mancala game on November 29, 2000, which was granted on February 13, 2002 (GB 2364926). The game is related to Dakon and can be used to teach arithmetics in primary schools. Al-Jajjoka also wrote a bestselling book on how to pass professional level psychometric tests.