IMO Mathematics Olympiad (SOF) Class 9: Questions 423  426 of 918
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Question number: 423
Question
From each corner of a square of side 6 cm a quadrant of a circle of radius 2 cm is cut and also a circle of diameter 4 cm is cut as shown in the figure, then the area of the remaining portion of the square is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 424
Question
A line passed through the point (3,6) and has gradient . Find the ycoordinate of a point on the line when x = 11.
Choices
Choice (4)  Response  

a.  13 

b.  12 

c.  14 

d.  15 

Question number: 425
Question
In a, the medians AD, BE and CF meet at G, then ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 426
Question
Volume of a hemisphere is 14564 cubic cm. The total surface area is ________
Choices
Choice (4)  Response  

a.  4525.12 sq. cm 

b.  1215.15 sq. cm 

c.  6545.25 sq. cm 

d.  3432.44 sq. cm 
