The document consists of ratio and proportion drills, presenting various exercises and problems related to proportions, means, and extremes. It includes multiple-choice questions, direct and inverse proportion problems, and partitive proportion examples with provided answers. The instructional format serves as practice for understanding and solving ratio-related mathematical problems.

1. RATIO AND
PROPORTION
DRILLS

2. ARE YOU
READY?

3. LET’S START!

4. In the ratio 1:3=5:15, 3 and 5
are called means while 1 and
15 is called _______

5. Write P if proportion and
NP if it is Not
8:20 = 16:40

6. Answer
P

7. Write P if proportion and
NP if it is Not
2:3 = 20:30

8. Answer
P

9. Write P if proportion and
NP if it is Not
8:12 = 4:18

10. Answer
NP

11. Answer
Extremes

12. What is the Value of n?
3:n = 6:10

13. Answer
5

14. What is the Value of n?
3:4 = 27:n

15. Answer
36

16. What is the Value of n?
4:5 = n:20

17. Answer
36

18. What is the Value of n?
n:9 = 12:18

19. Answer
6

20. What is the Value of n?
5:20 = 20:n

21. Answer
80

22. What is the Value of n?
12:18 = n:6

23. Answer
4

24. What is the Value of n?
12:18 = n:6

25. Answer
4

26. What is the Value of n?
8:24 = 16:n

27. Answer
48

28. What kind of Proportion is this?
* 2 points

29. What kind of Proportion is this?
* 2 points

30. What kind of Proportion is this?
* 2 points

31. Solve this Proportion
(4 points)
Two buses can transport 130 people. How
many buses are needed to transport 780
pupils?

32. Answer
12

33. Solve this Proportion
(5 points)
The ratio of male teachers to female
teachers in our school is 2:9. If there are
48 female teachers, how many teachers
are male?
Hint: Direct Proportion

34. Answer
216

35. Solve this Proportion
(5 points)
Eight teachers can finish interviewing 80
applicants for the school entrance examination in
12 days. If the interview period is to be finished in
4 days only, how many teachers should there be?
Hint: Inverse Proportion

36. Answer
15

37. Solve this Proportion
(4 points)
The ratio of doors to windows is 3:4.
There are 294 doors and windows in a
building. How many doors and windows
are there?
Hint: Partitive Proportion

38. Answer
126 doors
168 Windows

39. Solve this Proportion
(5 points)
Three numbers are in the ratio 2:3:9.
Find the second number if their sum is
350.
Hint: Partitive Proportion

40. Answer
75