IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 811  817 of 1022
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Question number: 811
Question
The ratio of the radii of two hulahoops is 2: 5. What is the ratio of their area?
Choices
Choice (4)  Response  

a.  25: 4  
b.  2: 5  
c.  4: 25  
d.  3: 2 
Question number: 812
Question
The radius of the given circle is 7 cm, then the area of the shaded portion is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 813
» Symmetry and Visualizing Solid Shapes
Question
The quadrilateral which has both line and rotational symmetry of order more than 1 is ________.
Choices
Choice (4)  Response  

a.  Rhombus  
b.  Square  
c.  Parallelogram  
d.  Rectangle 
Question number: 814
Question
The height of an isosceles triangle is cm long and its equivalent sides are 10 cm long. Its area is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 815
Question
If and , then the value of is ________.
Choices
Choice (4)  Response  

a.  1534  
b.  1781  
c.  1625  
d.  1624 
Question number: 816
» Logical and Analytical Reasoning
Question
‘Better’ is related to ‘worse’ as ‘complicated’ is related to ________.
Choices
Choice (4)  Response  

a.  Durable  
b.  Hard  
c.  Easy  
d.  Tricky 
Question number: 817
Question
A well of diameter 80 cm has a stone wall around it. If the length of the outer edge of the wall is 440 cm, then the width of the wall is ________.
Choices
Choice (4)  Response  

a.  20 cm  
b.  30 cm  
c.  60 cm  
d.  50 cm 