3.

If the ratio of boys to girls is 1:1, which of the following statements is correct? 

[ ] 
The number of boys is more than the number of girls 
[ ] 
The number of boys equals the number of girls 
[ ] 
The number of boys is less than the number of girls 
[ ] 
Nothing can be said about the number of boys and girls in this case 


4.

The ratio of brown rats to black rats is 4:8. If there are 24 black rats, how many brown rats are there? 



5.

Each of the following ratios show the ratio of girls to boys in three classes. If each class has the same number of pupils, which of the classes has the greatest ratio of girls to boys: 16:20, 8:10, 1:1.25? 

[ ] 
16:20 
[ ] 
1:1.25 
[ ] 
They all have the same ratio of girls to boys 
[ ] 
8:10 


6.

Peter has 20 blue pens. How many red pens must he buy if the ratio of blue to red pens has to be 2:3? 

[ ] 
30 
[ ] 
10 
[ ] 
60 
[ ] 
40 


7.

One hundred paintings have to be selected for an art exhibition. If the ratio of amateur paintings to professional paintings has to be 2:3, how many amateur paintings and professional paintings have to be selected? 

[ ] 
40 amateur paintings and 60 professional paintings 
[ ] 
60 amateur paintings and 40 professional paintings 
[ ] 
30 amateur paintings and 70 professional paintings 
[ ] 
20 amateur paintings and 80 professional paintings 


8.

The ratio of small houses to big houses is 4:7. Which of the following would not be acceptable on the basis of this ratio? 

[ ] 
8 small houses, 14 big houses 
[ ] 
16 small houses, 28 big houses 
[ ] 
14 small houses, 8 big houses 
[ ] 
12 small houses, 21 big houses 


9.

How else can the ratio 8:56 be written? 

[ ] 
7:56 
[ ] 
7:1 
[ ] 
1:7 
[ ] 
7:8 


10.

How else can the ratio 1.25:4 be written? 

[ ] 
16:5 
[ ] 
5:16 
[ ] 
1.25:16 
[ ] 
5:4 

