IMO Mathematics Olympiad Class 7: Questions 507  512 of 1012
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Question number: 507
Question
A library has 52 videotapes that can be checked out. On Monday the librarian counted 17 videotapes still on the shelf. How many videotapes were checked out from the library?
Choices
Choice (4)  Response  

a.  44 

b.  45 

c.  35 

d.  69 

Question number: 508
Question
The ratio of computers to mobiles in a shop is 6: 5. There are 32 fewer mobiles than computers. What is the total number of mobiles and computers in the shop?
Choices
Choice (4)  Response  

a.  352 

b.  215 

c.  192 

d.  160 

Question number: 509
Question
Ram and his mom were baking cupcakes. The recipe calls for one egg for every dozen cupcakes. Ram finds five eggs in his refrigerator and makes a chart to see how many cupcakes he can make.
Eggs

1

2

3

4

5

Cupcakes

12

24

36

48

 
What is the missing value in the chart?
Choices
Choice (4)  Response  

a.  17 

b.  60 

c.  72 

d.  49 

Question number: 510
Question
Ravi has a total of Rs. 25, 000. He spends 20 % of his money on books. How many rupees does he spend on books?
Choices
Choice (4)  Response  

a.  Rs. 5000 

b.  Rs. 4500 

c.  Rs. 5500 

d.  Rs. 1000 

Question number: 511
Question
In an office, there are 72 employees. The ratio of female to male is 3: 5. How many male are there in the office?
Choices
Choice (4)  Response  

a.  45 

b.  50 

c.  40 

d.  37 

Question number: 512
Question
Each of two groups of employees has 70 people. If of the first group are male employees and of the second group are male employees, how many more male employees of the first group than of the second group?
Choices
Choice (4)  Response  

a.  12 

b.  14 

c.  15 

d.  20 
