1. knowledge: this test mainly measures people's knowledge breadth, general learning and acceptance ability, memory of materials and understanding of daily things. 2. comprehension: this test mainly measures the ability to judge, use practical knowledge to solve new problems, and general knowledge. 3. arithmetic: this test mainly measures the reasoning ability of mathematical calculation and the ability of active attention. 4. similarity: this test is designed to measure logical thinking ability, abstract thinking ability and generalization ability. It is a good measure of G factors. 5. digital breadth: this test mainly measures attention and short-term memory.