IMO Mathematics Olympiad (SOF) Class 7: Questions 398  406 of 1012
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Question number: 398
Question
The value of x in is ________.
Choices
Choice (4)  Response  

a. 


b. 


c.  1 

d.  3 

Question number: 399
Question
The algebraic expression obtained on addition of following algebraic expression is ________.
Choices
Choice (4)  Response  

a. 


b. 


c.  2y 

d.  0 

Question number: 400
Question
The value of 25 coins of 20 p and 50 p is Rs. 9.80. The number of 50 p coins is ________.
Choices
Choice (4)  Response  

a.  16 

b.  30 

c.  20 

d.  32 

Question number: 401
Question
The value of is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 402
Question
Express 0.0084 in scientific notation.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 403
Question
The number which is multiplied by to obtain a product equal to is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 404
Question
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 405
Question
What is the value of at ?
Choices
Choice (4)  Response  

a.  ab 

b.  0 

c. 


d.  ac 

Question number: 406
Question
When a number is reduced by 12, it becomes 20 % of itself. Find the number.
Choices
Choice (4)  Response  

a.  15 

b.  30 

c.  12 

d.  25 
