IMO Mathematics Olympiad Class 8: Questions 116  123 of 1029
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Question number: 116
» 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: 117
» Linear Equations in One Variable
Question
The value of for which is_.
Choices
Choice (4)  Response  

a. 


b. 


c.  21 

d.  20 

Question number: 118
» 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: 119
» 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 

Question number: 120
» Linear Equations in One Variable
Question
Solution of the equation is_.
Choices
Choice (4)  Response  

a.  5 

b.  9 

c.  10 

d.  3 

Question number: 121
Question
Squares of an even numbers is always________.
Choices
Choice (4)  Response  

a.  Even 

b.  Odd 

c.  All of the above 

d.  None of the above 

Question number: 122
Question
If , then can be
Choices
Choice (4)  Response  

a.  12 

b.  11 

c.  13 

d.  15 

Question number: 123
Question
Square root of 2401 is________.
Choices
Choice (4)  Response  

a.  76 

b.  78 

c.  49 

d.  87 
