IMO Mathematics Olympiad (SOF) Class 8: Questions 563  571 of 1030
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Question number: 563
Question
If, then the value of a is
Choices
Choice (4)  Response  

a.  1 

b.  2 

c.  4 

d.  3 

Question number: 564
» 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: 565
Question
The value of , is________.
Choices
Choice (4)  Response  

a.  3 

b.  5 

c.  4 

d.  7 

Question number: 566
» 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: 567
» 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: 568
Question
If, then the value of a is
Choices
Choice (4)  Response  

a.  3 

b.  1 

c.  2 

d.  4 

Question number: 569
» 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: 570
» 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 

Question number: 571
Question
Number of prime factors in is
Choices
Choice (4)  Response  

a.  20 

b.  28 

c.  23 

d.  22 
