It seems you've uploaded a math problem in Vietnamese, consisting of several questions. Let me break it down:

Question 1:

There is a sequence of arrows, and you need to choose the image that logically follows the sequence.

Question 2:

You are given a sequence of numbers: 2, 4, 8, 16, 20, 22, 44, 46. One of them does not follow the pattern, and you are asked to find the incorrect one and correct it.

Question 3:

A construction team worked for 3 days, covering a total of 4050 meters of road. On the second day, they covered 30 meters less than on the first day. The third day, they worked half as much as the first day. How much did they cover each day?

Question 4:

An is giving out candies. After one round, An gave a certain number of candies to her daughter. In the second round, An gave away 1/3 of the number of candies to her daughter as compared to the first round. How many candies did An give away in total?

Question 5:

A construction team worked on the national stadium. They faced some challenges with the road surface. After calculating the total investment, they figured out that the total cost for repairs was 36 million. How much did the team spend on each phase?

I will now proceed to analyze and solve each question. Would you like a detailed solution for each one?