IMO Mathematics Olympiad Class 8: Questions 839  843 of 1029
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Question number: 839
Question
Out of a number of electronics item. Ram purchases 60 % washing machines 2 % of these are found to be defective. The percentage of defective washing machine in all is________.
Choices
Choice (4)  Response  

a.  1.2% 

b.  3.5% 

c.  5.5% 

d.  4.0% 

Question number: 840
Question
Tarun goes to a shop to buy a shirt costing Rs. 1000 including sales tax of 15%. He asks the shopkeeper to reduce the price of the watch so that he can save an amount equal to the sales tax. The reduction in the price of the sari is________.
Choices
Choice (4)  Response  

a.  Rs 120 

b.  Rs 150 

c.  Rs 250 

d.  None of the above 

Question number: 841
Appeared in Year: 2012
Question
A person wants to reduce the trade tax so he calculates his profit on the sale price instead of on the cost price. In this way by selling an article for Rs. 280 he calculates his profit as what is the actual profit percentage?
Choices
Choice (4)  Response  

a.  20.25% 

b.  14.86% 

c.  16.66% 

d.  15.00% 

Question number: 842
Question
A dog takes 4 leaps for every 5 leaps of a hare but 3 leaps of a dog are equal to 4 leaps of the hare. Compare their speeds.
Choices
Choice (4)  Response  

a.  12: 13 

b.  15: 16 

c.  11: 12 

d.  All of the above 

Question number: 843
Question
The ratio of ages of Mahesh and Ramesh is 3: 5. After 12 years this ratio becomes 5: 7. What is the present age of Ramesh?
Choices
Choice (4)  Response  

a.  25 years 

b.  20 years 

c.  30 years 

d.  10 years 
