IMO Level 1 Mathematics Olympiad (SOF) Class 10: Questions 443  446 of 968
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Question number: 443
Question
If occur with frequencies respectively, then the arithmetic mean is ________
Choices
Choice (4)  Response  

a.  62.43 

b.  26.34 

c.  43.62 

d.  34.26 

Question number: 444
» Triangle, Circle & Constructions
Question
Given below are the steps of construction of a pair of tangents to a circle of radius 4 cm from a point on the concentric circle of radius 6 cm. find which of the following step is wrong?

Step I: Take a point O on the plane paper and draw a circle of radius . Also, draw a concentric circle of radius .

Step II: Find the midpoint A of OB and draw a circle of radius . Suppose this circle intersects the circle of radius 4 cm at P and Q.

Step III: Join BP and BQ to get the desired tangents.
Choices
Choice (4)  Response  

a.  (1) and (2) 

b.  Only (2) 

c.  Only (1) 

d.  (2) and (3) 

Question number: 445
Question
Points are joined to form which shape?
Choices
Choice (4)  Response  

a.  Pentagon 

b.  Snip single corner Rectangle 

c.  Snip round corner Rectangle 

d.  Chord 

Question number: 446
Question
Find the area of the quadrilateral, the coordinates of whose angular points taken in order are.
Choices
Choice (4)  Response  

a.  25 

b.  24 

c.  28 

d.  22 
