Direct and Inverse Proportions (IMO Mathematics Olympiad (SOF) Class 8): Questions 35  41 of 62
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Question number: 35
» Direct and Inverse Proportions
Question
For a group of 24 students food lasts for 35 days. For how many days will the same food last for 30 students?
Choices
Choice (4)  Response  

a.  25 days 

b.  30 days 

c.  28 days 

d.  20 days 

Question number: 36
» Direct and Inverse Proportions
Question
If 6 men take two hour to dig a ditch, how long should it take 16 men to dig a ditch of the same type?
Choices
Choice (4)  Response  

a.  53 min 

b.  35 min 

c.  20 min 

d.  45 min 

Question number: 37
» Direct and Inverse Proportions
Question
The ratio which bears to is________.
Choices
Choice (4)  Response  

a.  1.78 

b.  1.64 

c.  1.50 

d.  1.68 

Question number: 38
» Direct and Inverse Proportions
Question
A man completes of a job in 15 days. At this rate how many more days will it take him to finish the job?
Choices
Choice (4)  Response  

a.  27 

b.  22 

c.  22.5 

d.  25 

Question number: 39
» Direct and Inverse Proportions
Question
can do a piece of work in 10 days and can do alone it in 12 days. B works at it for 5 days and then leaves. alone can finish the remaining work in________.
Choices
Choice (4)  Response  

a.  5.8 days 

b.  7.5 days 

c.  6 days 

d.  6.5 days 

Question number: 40
» Direct and Inverse Proportions
Question
1.20 of a number equals 0.36 of another number. The ratio of the number is________.
Choices
Choice (4)  Response  

a.  10: 3 

b.  3: 10 

c.  3: 2 

d.  2: 3 

Question number: 41
» Direct and Inverse Proportions
Question
If 4 men take an hour to dig a ditch, how long should it take 10 men to dig a ditch of the same type?
Choices
Choice (4)  Response  

a.  20 min 

b.  23 min 

c.  24 min 

d.  30 min 
