IMO Mathematics Olympiad Class 8: Questions 64  69 of 1029
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Question number: 64
» Linear Equations in One Variable
Question
Two angles in a triangle in the ratio 2: 5. If the sum of these angles is equal to the third angle, then the third angle is_.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 65
» Linear Equations in One Variable
Question
Find three summing consecutive, whose sum is 90.
Choices
Choice (4)  Response  

a.  29, 30, 31  
b.  30, 31, 32  
c.  25, 26, 27  
d.  92, 91, 90 
Question number: 66
» Linear Equations in One Variable
Question
Ram has Rs. 30 in the form of fifty paise and twenty five paise coins. He has twice as many twenty five paise coins as he has fifty paise coins. The number of coins of each kind are_.
Choices
Choice (4)  Response  

a.  10 and 30  
b.  20 and 50  
c.  30 and 60  
d.  15 and 30 
Question number: 67
» Linear Equations in One Variable
Question
Two angles in a triangle in the ratio 2: 3. If the sum of these angles is equal to the third angle, then the third angle is_.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 68
» Linear Equations in One Variable
Question
The length of a rectangle is 6 m more than twice of its breadth. The length and breadth of the rectangle if its perimeter is 162 m, is_.
Choices
Choice (4)  Response  

a.  55m, 30m  
b.  56m, 25m  
c.  55m, 20m  
d.  48m, 22m 
Question number: 69
» Linear Equations in One Variable
Question
A motor boat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 and half hours. The speed of the water is 1.5 km/hr. The speed of the boat in still water is_.
Choices
Choice (4)  Response  

a.  19.5 km/hr  
b.  10 km/hr  
c.  5 km/hr  
d.  11 km/hr 