Number magic can mean a lot of things. One of the magics about numbers is that they are believed to have power. This goes for say, 3, 7 and 13 and some more.
Numbers are either lucky or unlucky. In Chinese, the numbers 6 and 8 are particularly lucky numbers. The reason is that they sound like some of the most positive words in human language. 6 sounds like happiness, 8 like fortune. That's the reason Chinese speaking countries have acquired country phone codes like these:
86 - China
886 - Taiwan
NumberWiz represents a different sort of number magic: arithmetic. Arithmetic is magic and so are the great practitioners of mental arithmetic. However one doesn't have to be a master to enjoy it. I suspect it's the other way round. Take skiing. Does a good alpine skier enjoy skiing more than a beginner? I doubt it. Rather the skier who is on the steepest learning curve enjoys it the most.
Enjoy NumberWiz and make sure you keep learning.