When your answer Upvoted as a useful you got ten points but when your question Upvoted as a useful you only got two points,why don't have same points?

Because we are looking for the answer, not the question.

The answer helps those looking for it, but the question is directed to its owner

Answers are more valuable than questions because they require knowledge, giving more reputation to answers rewards learning and acquiring that.

The relationship of the the teachers with students is friendly then there is nothing to difficult. 

Teachers always make their students is a great personality for the community. 

If there is no teachers available in the world .

How the world can develop teachers is like light for the world  teachers are gifted from the god

The number of points that a user receives for their contributions on a Q&A platform like this one can vary depending on the platform's specific rules and algorithms. In general, asking a question is considered a less valuable contribution than providing a helpful answer, as it requires less effort and expertise. As a result, users may receive fewer points for their questions than for their answers. Additionally, the platform may assign different weights to different types of contributions in order to encourage users to provide high-quality answers and valuable information. Ultimately, the specific rules and algorithms for awarding points are determined by the platform and may vary from one platform to another.

In the case of the answer, proof of flexibility and ability to solve matters and problems, but when asked, proof of good thinking only