Linear Equations in One Variable (IMO Mathematics Olympiad Class 8): Questions 52  58 of 61
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Question number: 52
» Linear Equations in One Variable
Question
Rohit was 4 times as old as his son 8 years ago. After 8 years, Rohit will be twice as old as his son. What are their present ages?
Choices
Choice (4)  Response  

a.  20 years, 50 years 

b.  10 years, 30 years 

c.  15 years, 35 years 

d.  16 years, 40 years 

Question number: 53
» Linear Equations in One Variable
Question
If of a number is 20 less than the original number, then the number is_.
Choices
Choice (4)  Response  

a.  30 

b.  50 

c.  40 

d.  60 

Question number: 54
» Linear Equations in One Variable
Question
If the angles of a triangle are in the ratio 3: 2: 1, then the difference between the greatest and smallest angles is_.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  60 

Question number: 55
» Linear Equations in One Variable
Question
A number consists of two digits whose sum is 10. If 18 is added to the number, the digits are interchanged. The number is_.
Choices
Choice (4)  Response  

a.  26 

b.  46 

c.  62 

d.  64 

Question number: 56
» Linear Equations in One Variable
Question
The value of for which is_.
Choices
Choice (4)  Response  

a. 


b. 


c.  21 

d.  20 

Question number: 57
» Linear Equations in One Variable
Question
The length of a rectangle is 5 m less than three times its breadth. The length and breadth of the rectangle if its perimeter is 150 m, is_.
Choices
Choice (4)  Response  

a.  55m, 20m 

b.  30m, 20m 

c.  55m, 30m 

d.  20m, 50m 

Question number: 58
» Linear Equations in One Variable
Question
A man is 6 years older than his wife and his wife is now thrice as old as their daughter, who is 10 years old. How old the man when his daughter was born?
Choices
Choice (4)  Response  

a.  26 years 

b.  25 years 

c.  22 years 

d.  20 years 
