Every couple of years, disciples from inner sects get recalled by their clans, leaving room for new recruits to the inner sect from the outer sect. To determine who will fill the quota, multiple tests will be done on the aspirant outer sect members and they will be rated according to their success. If there are ten quotas, 10 people will be accepted into the inner sect.
Amongst those who are accepted to the sect. there will be a certain amount of people who wants to be divination master. Among those people, many of them will not be able to wrap their heads around the intricacies of mathematics. Those who are disrespectful towards Wang Feng have been cut off from learning divination too. Most arrogant young masters were eliminated at this juncture. When someone offends the cheese maker, they should expect no cheese on their table. So, such disrespectful silver-spoon youngsters shall make do without being able divine things.