IMO Mathematics Olympiad Class 8: Questions 538  545 of 1029
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Question number: 538
» Direct and Inverse Proportions
Question
The ratio of boys and girls in a school of 650 students is . How many boys should be admitted to make ratio ?
Choices
Choice (4)  Response  

a.  140 

b.  130 

c.  150 

d.  120 

Question number: 539
Question
The value of
Choices
Choice (4)  Response  

a.  7 

b.  1 

c.  5 

d.  6 

Question number: 540
Question
The value of is ________.
Choices
Choice (4)  Response  

a.  100 

b.  200 

c.  800 

d.  400 

Question number: 541
» Direct and Inverse Proportions
Question
The ratio which bears to is________.
Choices
Choice (4)  Response  

a.  1.50 

b.  1.65 

c.  1.68 

d.  1.78 

Question number: 542
» Direct and Inverse Proportions
Question
If and , then the value of is ________.
Choices
Choice (4)  Response  

a.  10 

b.  6 

c.  8 

d.  9 

Question number: 543
» Direct and Inverse Proportions
Question
A sum of money is sufficient to pay wages for 25 days and wages for 25 days. The same money is sufficient to pay the wages of both for ________.
Choices
Choice (4)  Response  

a.  11 days 

b.  days 

c.  10 days 

d.  12 days 

Question number: 544
» Direct and Inverse Proportions
Question
A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 1: 4: 5. If their total value is Rs. 90, the number of 10 paise coins is ________.
Choices
Choice (4)  Response  

a.  400 

b.  500 

c.  800 

d.  600 

Question number: 545
» Direct and Inverse Proportions
Question
If A: B = 1: 4 and B: C = 3: 5, then C: A is equal to, ________.
Choices
Choice (4)  Response  

a.  24: 15 

b.  25: 14 

c.  3: 20 

d.  20: 3 
