1, house number: This is the most direct and obvious answer. Every house generally has a house number, which is a clear digital identification. These figures can tell us the specific address of this house, which is convenient for people who need to find this house, such as postmen and couriers.

2. Floor and room number: If you live in an apartment or building, then the floor and room number are also numbers. These figures help us determine our specific position in the building.

3. Building area and room area: Although these figures may not be obvious, they are an important part of the house. The building area determines the overall size of the house, and the room area determines the spaciousness of each space.

4. Telephone number: Although the telephone number is not directly hidden in the house, it is closely related to the house. Every family usually has a fixed telephone number, which is an important way for us to contact with the outside world.

5. Family population: This is also a figure closely related to the house. The number of family members determines how big a house we need and how many bedrooms and bathrooms we need.

The benefits of learning mathematics:

1, improve the ability to solve problems: learning mathematics can help us better understand and solve problems in life, such as financial problems, time management problems and so on. Through mathematical modeling and data analysis, problems can be predicted and solved more accurately.

2. Enhance the ability of logical thinking: Mathematics is a subject that requires strict logical thinking. By studying mathematics, we can exercise our logical thinking ability and make our thinking more rigorous and orderly.

3. Improve creativity: Mathematics is a subject that needs innovative spirit. Learning mathematics can stimulate our creativity and imagination, and let us better understand and create new concepts and ideas.

4. Enhance self-confidence: Mathematics is a very difficult subject. When we master mathematics knowledge through hard work, we will feel that we have achieved something, thus enhancing our self-confidence.

5. Broaden career choices: Studying mathematics can provide more opportunities for our future career choices. Many occupations need math skills, such as science, engineering, finance, medicine and other fields. Mastering mathematics can make us more competitive in these fields.