IMO Mathematics Olympiad (SOF) Class 7: Questions 535  540 of 1012
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Question number: 535
Question
The ratio of boys to girls in a club is 7: 4. There are 21 fewer girls than boys. What is the total number of children in the club?
Choices
Choice (4)  Response  

a.  77 

b.  49 

c.  84 

d.  231 

Question number: 536
Question
The ratio of girls to boys in a classes is 5: 3. There are 46 fewer boys than girls. What is the total number of children in the classes?
Choices
Choice (4)  Response  

a.  184 

b.  115 

c.  69 

d.  135 

Question number: 537
Question
A class has 21 students. The ratio of girls to boys is 4: 3. How many girls are there in the class?
Choices
Choice (4)  Response  

a.  7 

b.  9 

c.  12 

d.  8 

Question number: 538
Question
I and my wife were sitting in a garden. After a while there came two old men followed by two old ladies. They were followed by three couples who were accomplished by two children each. What was the number of total persons present in the garden?
Choices
Choice (4)  Response  

a.  17 

b.  15 

c.  11 

d.  12 

Question number: 539
Question
Falak can solve 1 mathematical problem in 7 minutes. Then what time she will take to complete similar 12 problems?
Choices
Choice (4)  Response  

a.  2 hrs 30 min 

b.  1 hr 34 min 

c.  1 hr 24 min 

d.  1 hrs 4 min 

Question number: 540
Question
By selling jeans for Rs. 630 a shopkeeper loses 10%. At what price should he sell the jeans so as to gain 10%?
Choices
Choice (4)  Response  

a.  Rs. 770 

b.  Rs. 275 

c.  Rs. 350 

d.  Rs. 750 
