IMO Mathematics Olympiad (SOF) Class 9: Questions 432  435 of 919
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Question number: 432
Question
The edge of a cube is 20 cm. how many small cubes of 5 cm edge can be formed from this cube?
Choices
Choice (4)  Response  

a.  32 

b.  64 

c.  100 

d.  4 

Question number: 433
Question
A corn cob somewhat like a cone, has the radius of the broadest end as 2.1 cm and length as 20 cm. If each 1 cm ^{2} of the surface of the cob carries an average of 3 grains, find how many grains you would find on the entire cob?
Choices
Choice (4)  Response  

a.  670 grains 

b.  881 grains 

c.  980 grains 

d.  550 grains 

Question number: 434
Question
Points P, Q, R and S divide the sides of rectangle ABCD in the ratio, as shown in the figure. What fraction of area of the rectangle is the area of the parallelogram PQRS?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 435
Question
ABCD is a square of side length 1. EFGH are the points on AE = EB, 2BF = FC, 3CG = GD, 4DH = HA then what is the area of the quadrilateral EFGH?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

