IMO Mathematics Olympiad (SOF) Class 8: Questions 818  822 of 1029
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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. 


Question number: 821
Question
A rectangular sheet of paper 30 cm X 18cm can be transformed into a right circular cylinder in two ways  by rolling the paper along its length or by rolling it along its breadth. Find the ratio of the volume of two cylinders formed.
Choices
Choice (4)  Response  

a.  4: 3 

b.  5: 3 

c.  3: 2 

d.  1: 5 

Question number: 822
Question
A ladder is leaning against a house. The distance from the top of the ladder to the ground is 12 feet, and the distance from the foot of the ladder to the house is 4 feet. How tall is the ladder?
Choices
Choice (4)  Response  

a.  12.65 feet 

b.  12 feet 

c.  13 feet 

d.  Question does not provide sufficient data or is vague 
