IMO Mathematics Olympiad Class 10: Questions 488  492 of 958
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Question number: 488
Question
The mean of 9 observations is 36. If the mean of the first 5 observations is 32 and that of the last 5 observations is 39, then the fifth observation is ________
Choices
Choice (4)  Response  

a.  37 

b.  28 

c.  31 

d.  43 

Question number: 489
Question
is three vertices of the parallelogram WXYZ. The coordinates of fourth vertex is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 490
Question
If the Points are collinear then which of the following is true?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 491
Question
The vertices of are . If AD is angle bisector, where D meets on BC, then coordinates of D are ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 492
» Triangle, Circle & Constructions
Question
In the figure, is isosceles. Then ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

