IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 237  242 of 929
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Question number: 237
Question
On plotting the points A (2,9), B (6,11), C (10,9), D (8,5), E (4,5) and joining AB, BC, CD, CE, EA, Which of the following figure is obtained?
Choices
Choice (4)  Response  

a.  Pentagon  
b.  Trapezoid  
c.  Parallelogram  
d.  Hexagon 
Question number: 238
Question
Squares ABCD and EFGH are congruent, and G is the center of square ABCD. The area of the shaded region in the plane is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 239
Question
27 metal balls each of radius r are melted together to from one big sphere of radius R. Then the ratio of surface area of the big sphere to that of a ball is ________
Choices
Choice (4)  Response  

a.  3  
b. 
 
c.  
d.  9 
Question number: 240
» Lines, Angles and Quadrilaterals
Question
A running track is the ring formed by two concentric circles. It is 15 feet wide. The circumferences of the two circles differ by about ________
Choices
Choice (4)  Response  

a.  65 feet  
b.  94 feet  
c.  75 feet  
d.  90 feet 
Question number: 241
» Lines, Angles and Quadrilaterals
Question
From the adjoining figure . The value of x is ________
Choices
Choice (4)  Response  

a.  
b.  
c.  
d. 
Question number: 242
Question
A rectangle is divided into four smaller rectangles, as shown in the figure. Three of them have areas, and as indicated. Then the area of the shaded rectangle is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
