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 
