FRAME NUMBER 13

LEVEL A

Let's try and solve more difficult problems. The sum of two numbers having a ratio of I to 3 is

32. What are the numbers?

Solution: Let X represent the smaller number and 3X the larger number. X + 3X = 32. 4X = 32, X =

8; then 3X = 24.

Check: Does 8 + 24 = 32? Yes.

Solve this problem: Sum of two numbers having a ratio of 4 to 7 is 99. What are the numbers?

a. Smaller number______________ b. Larger number______________

FRAME NUMBER 26

LEVEL B

Example of inverse proportion: "Six workmen completed a job in 10 days. It will take 15

workmen 4 days to do the same Job. This is an inverse proportion because an increase in workmen will

the number of days.

FRAME NUMBER 39

LEVEL C

The distance between two points on a 1:12,500 scale map is 14.1 inches. What is the distance between

the same two points on a 1:23,500 scale map?

Express answer in inches.

27

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