IMO Mathematics Olympiad Class 8: Questions 816  820 of 1029
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Question number: 816
Question
At 7.00 am, the temperature was 6F, The temperature was 7F higher at noon. Which one of the following expression can be used to calculate the temperature at noon?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  None of the above 

Question number: 817
Appeared in Year: 2012
Question
The ratio of present ages of Rahul and Deepesh is 3: 5.10 years later this ratio becomes 5: 7. What is the present age of Deepesh?
Choices
Choice (4)  Response  

a.  10 years 

b.  20 years 

c.  25 years 

d.  15 years 

Question number: 818
Question
Priya goes to a shop to buy a dress costing Rs. 2000 including sales tax of 10%. 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 dress is________.
Choices
Choice (4)  Response  

a.  Rs 200 

b.  Rs 150 

c.  Rs 250 

d.  Question does not provide sufficient data or is vague 

Question number: 819
Question
At what rate percent per annum will a sum of money double in 10 years?
Choices
Choice (4)  Response  

a.  15% 

b.  5% 

c.  10% 

d.  20% 

Question number: 820
Question
The ratio of two numbers is 1: 2. Which of the following ratio is equivalent to 1: 2?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

