IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 715  720 of 1022
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Question number: 715
Question
I’m going to place a rope around perimeter of our school playground that is in the shape of an octagon. The sides are 10 m, 10 m, 8 m, 8m, 5m, 5 m, 9 m, 9 m. How many meters of rope will be needed for the perimeter?
Choices
Choice (4)  Response  

a.  164 m  
b.  38 m  
c.  138 m  
d.  64 m 
Question number: 716
Question
Simplify:
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 717
Question
A ludo die is rolled, then the probability that the number of dots on its upper face is less than 4 is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c.  1  
d.  0 
Question number: 718
» Symmetry and Visualizing Solid Shapes
Question
After rotating by about a center, a figure looks exactly the same as at its original position. At what other angle will this happen for the figure?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 719
Question
The area of two circles are in the ratio 25: 36. Then the ratio of their circumference is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 720
» Symmetry and Visualizing Solid Shapes
Question
Mirror image of
is ________.
Choices
Choice (4)  Response  

a.  
b.  
c.  
d. 