IMO Mathematics Olympiad (SOF) Class 9: Questions 851  858 of 919
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Question number: 851
Question
The sum of the xcoordinates of the intersection of and , is ________.
Choices
Choice (4)  Response  

a. 


b.  0 

c. 


d. 


Question number: 852
Question
Average of 10 numbers is 12. What should be added as 11^{th} number to make the average 13?
Choices
Choice (4)  Response  

a.  28 

b.  25 

c.  30 

d.  23 

Question number: 853
» Analytical Reasoning and Logical Reasoning
Question
Mathematics is related to numbers in the same way as history is related to ________
Choices
Choice (4)  Response  

a.  Dates 

b.  Events 

c.  Wars 

d.  People 

Question number: 854
Question
Age of Smith’s father is 4 times of his age. If 5 years ago, father’s age was 7 times of the age of his son at that time. What is Smith’s father present age?
Choices
Choice (4)  Response  

a.  51 years 

b.  60 years 

c.  40 years 

d.  45 years 

Question number: 855
Question
If , then , is ________.
Choices
Choice (4)  Response  

a.  1 

b.  2 

c.  0 

d.  3 

Question number: 856
Question
A and B invest in a business in the ratio. If of the total profit goes to charity and A’s share is Rs. 855, the total profit is ________
Choices
Choice (4)  Response  

a.  Rs. 1576 

b.  Rs. 1425 

c.  Rs. 1537.50 

d.  Rs. 1500 

Question number: 857
Question
If the mean of 17 observations is 22 and that of another 18 observations is 10, then the mean of 35 observations is ________
Choices
Choice (4)  Response  

a.  24 

b.  15.83 

c.  15 

d.  24.8 

Question number: 858
» Introduction to Euclid's Geometry
Question
The ratio of two supplementary angles is , What is the measure of the greater angle?
Choices
Choice (4)  Response  

a.  120˚ 

b.  100˚ 

c.  140˚ 

d.  160˚ 
