Mental Ability (NCO Cyber Olympiad (SOF) Class 6): Questions 138  144 of 394
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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 

Question number: 144
» Mental Ability » Basic Geometry
Question
In parallelogram ABCD, E and F are the midpoints of AB and CD respectively. Which of the following is not true?
Choices
Choice (4)  Response  

a. 


b.  ED is not parallel to BF 

c.  AF trisects BD 

d.  CE trisects BD 
