Mental AbilityNumber Games (NCO Cyber Olympiad (SOF) Class 8): Questions 1  9 of 30
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Question number: 1
» Mental Ability » Number Games
Question
The value of is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 2
» Mental Ability » Number Games » Number Analogies
Question
The sum of two numbers is 30 and the difference of their squares is 30. The difference of the numbers is
Choices
Choice (4)  Response  

a.  1  
b.  0  
c.  8  
d.  3 
Question number: 3
» Mental Ability » Number Games
Question
The value of is
Choices
Choice (4)  Response  

a.  79  
b.  350  
c.  343  
d.  2401 
Question number: 4
» Mental Ability » Number Games
Question
The value of is
Choices
Choice (4)  Response  

a.  6  
b. 
 
c.  27  
d.  3 
Question number: 5
» Mental Ability » Number Games » Number Analogies
Question
What least number must be subtracted from 136 to make it a perfect square?
Choices
Choice (4)  Response  

a.  15  
b.  8  
c.  21  
d.  7 
Question number: 6
» Mental Ability » Number Games » Number Analogies
Question
What least number must be added to 219 to make it a perfect square?
Choices
Choice (4)  Response  

a.  6  
b.  23  
c.  19  
d.  12 
Question number: 7
» Mental Ability » Number Games » Number Analogies
Question
The sum of two numbers is 45 and the difference of their squares is 45. The difference of the numbers is
Choices
Choice (4)  Response  

a.  6  
b.  0  
c.  9  
d.  1 
Question number: 8
» Mental Ability » Number Games
Question
The difference between the compound interest and the simple interest on a certain sum at 20 % per annum for 3 years is Rs. 428.50. Find the sum.
Choices
Choice (4)  Response  

a.  Rs.  
b.  Rs.  
c.  Rs.  
d.  836.92 Rs. 
Question number: 9
» Mental Ability » Number Games
Question
The denominator of a rational number is less than its numerator by 2. If 3 is added to the numerator and 2 is subtracted from its denominator, the new number becomes . Find the original number.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
