RATIO and PROPORTION

Using the concept of Direct Proportion, all are proportions to 12 : 36, EXCEPT

• 1 : 3

• 24 : 72

• 6 : 18

• 8 : 25

Which pair of ratios shows a direct proportion ?

• 6: 15 and 2: 45

• 6: 2 and 15: 45

• 2:15 and 6 : 45

• 45: 2 and 15:6

Yesterday, Ada answered correctly 6 out of a 10-item math quiz. How many items should she answer correctly in a 20-item quiz to equate her performance yesterday?

• 10

• 12

• 14

• 16

Your father bought 7 cans of paint in a ratio of blue to red of 4:3. What would your father need if he doubled the amount of paint in direct proportion?

• 8:6

• 6:8

• 4:4

• 3:2

For every 3 classes in the intermediate grades, there are 5 teachers. How many teachers are there for 15 classes?

• 5

• 15

• 25

• 35

A baker uses 3 cups of raisins in every batch of puto. How many cups of raisins does he use when he bakes 6 batches?

• 2

• 9

• 18

• 24

It takes Mike 18 minutes to finish reading 4 pages of a book. How long does it take for him to finish reading 30 pages?

• 102

• 135

• 184

• 540

A machine can produce 6 meters of fabric in 2 minutes. How many meters fabric can the machine produce in 30 minutes ?

• 12

• 90

• 180

• 360

It is said that a ratio of egg yolks to condensed milk to make a perfect egg pie is 6 pieces to 1 cup. How many cups of milk will you need if you have 48 egg yolks?

• 8

• 48

• 288

• 488

There are 4 boys to 7 girls in a musical band. At the same ratio, how many boys are there if there are 42 girls?

• 6

• 24

• 28

• 294