10. On ray Ox, take points A, B such that OA = 3 cm, OB = 5 cm. In the opposite
ray of ray Ox, draw a line segment OC = 1 cm. Find the lengths of the line segments
AB, AC, BC.
Answer: _________________________________________________________.
11. Find all integers x such that 4 ⋮ (x - 3).
Answer: _________________________________________________________.
12. What is the smallest even prime number?
Answer: _________________________________________________________.
13. Find all possible values of a such that
9a
is a composite number.
Answer: _________________________________________________________.
14. Find all factors of 48 that are less than 9.
Answer: _________________________________________________________.
15. How many cubic units are there in the following solid?
Loga
Sinh Học lớp 12
