IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 613  618 of 929
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Question number: 613
Question
The mean of 13 observations is 14. If the mean of the first 7 observations is 12 and that of the last 7 observations is 16, then the 7^{th} observation is ________
Choices
Choice (4)  Response  

a.  14 

b.  18 

c.  12 

d.  16 

Question number: 614
» Analytical Reasoning and Logical Reasoning
Question
In the given question, which number can replace the question mark
Choices
Choice (4)  Response  

a.  1 

b.  7 

c.  36 

d.  9 

Question number: 615
Question
A man purchases an electric heater whose printed price is Rs. 160. If he received two successive discounts of and , he p
Choices
Choice (4)  Response  

a.  Rs. 112 

b.  Rs. 129.60 

c.  Rs. 119.60 

d.  Rs. 115.20 

Question number: 616
» Linear Equations in Two Variables
Question
If, then values of y are________
Choices
Choice (4)  Response  

a.  y = 20 and y = 30 

b.  y = 15 and y=10 

c.  y = 25 and y = 5 

d.  y=10 and y=30 

Question number: 617
Question
Algebraic sum of the deviation of a set of values of a data from their mean is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 618
» Linear Equations in Two Variables
Question
Rakesh has dollars more than Mohan has, and together they have a total of dollars. Which of the following represented the number of dollars than Mohan has?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

