Mental Ability (NCO Cyber Olympiad Class 6): Questions 137  143 of 394
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Question number: 137
» Mental Ability » Basic Algebra
Question
Given, the value of is ________.
Choices
Choice (4)  Response  

a.  28 

b.  2 

c.  6 

d.  44 

Question number: 138
» Mental Ability » Basic Geometry
Question
In equivalent triangle ABC, D and E are the midpoints of AB and BC respectively. Which of the following is not true?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 139
» Mental Ability » Basic Algebra
Question
Given, the value of is ________.
Choices
Choice (4)  Response  

a.  15 

b.  75 

c.  2 

d.  12 

Question number: 140
» Mental Ability » Basic Arithmetic
Question
By how much must 3 be increased so that it bears same ratio to 10 as 18 to 36?
Choices
Choice (4)  Response  

a.  1 

b.  4 

c.  2 

d.  3 

Question number: 141
» Mental Ability » Basic Arithmetic
Question
Choices
Choice (4)  Response  

a.  2.7 

b.  270 

c.  0.27 

d.  27 

Question number: 142
» Mental Ability » Basic Arithmetic
Question
The subtraction of two irrational numbers________.Choices
Choice (4)  Response  

a.  May be rational in some cases and irrational in some other cases 

b.  An integer 

c.  Is always irrational 

d.  Is always rational 

Question number: 143
» Mental Ability » Basic Arithmetic
Question
By how much must 27 be decreased so that it bears same ratio to 49 as 12 to 28?Choices
Choice (4)  Response  

a.  3 

b.  2 

c.  6 

d.  7 
