Vòng 2 - Vòng sơ khảo

Question 2: 8

Question 5: 4

Question 6: 18

Question 7: 10000

Question 8:\(\dfrac{5}{2}\)

Question 9: 41

Question 10: 11

Question 11: 6.4

Question 15: 2.5

Question 19: 8.3