IMO Mathematics Olympiad Class 9: Questions 284  287 of 919
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Question number: 284
Question
In the figure , and. If the exterior angle XZK is, then the angle NMX is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 285
Question
The number of spherical balls each 4 cm in diameter be made out of a rectangular solid is ________
Choices
Choice (4)  Response  

a.  107 

b.  109 

c.  102 

d.  105 

Question number: 286
Question
The ratio between the perimeter and breadth of rectangle is. If the area of the rectangle is 116 sq. cm. then length of the rectangle is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 287
Question
The and are right angles. If, and, then the length of BD is ________
Choices
Choice (4)  Response  

a.  25 cm 

b.  15 cm 

c.  12 cm 

d.  16 cm 
