Direct and Inverse Proportions (IMO Mathematics Olympiad Class 8): Questions 28  34 of 62
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 1029 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 450.00 or
Question number: 28
» 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: 29
» 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 

Question number: 30
» Direct and Inverse Proportions
Question
can do a piece of work in 70 days. He works at it for 7 days and then alone finishes the work in 40 days. The two together could have completed the work in ________.
Choices
Choice (4)  Response  

a.  30 days 

b.  23.8 days 

c.  20.5 days 

d.  23 days 

Question number: 31
» Direct and Inverse Proportions
Question
Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
Choices
Choice (4)  Response  

a.  2 minutes 

b.  6 minutes 

c.  5 minutes 

d.  8 minutes 

Question number: 32
» Direct and Inverse Proportions
Question
An agent receives a commission of Rs. 50.00 on sales of Rs. 3500.00. The commission he get on sales of Rs. 300.00 is________.
Choices
Choice (4)  Response  

a.  Rs 4.00 

b.  Rs 3.50 

c.  Rs 4.28 

d.  Rs 2.87 

Question number: 33
» Direct and Inverse Proportions
Question
If A: B = 2: 3 and B: C = 3: 5, then C: A is equal to, ________.
Choices
Choice (4)  Response  

a.  2: 3 

b.  4: 5 

c.  5: 2 

d.  5: 4 

Question number: 34
» Direct and Inverse Proportions
Question
0.9 of a number equals 0.03 of another number. The ratio of the number is________.
Choices
Choice (4)  Response  

a.  10: 3 

b.  1: 30 

c.  3: 10 

d.  3: 20 
