Mental Ability (NCO Cyber Olympiad Class 9): Questions 107  114 of 219
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Question number: 107
» Mental Ability » Basic Arithmetic
Question
How much pure alcohol should be added to 400ml of a 15 % solution to make its strength 32%?
Choices
Choice (4)  Response  

a.  100 ml 

b.  95 ml 

c.  90 ml 

d.  80 ml 

Question number: 108
» Mental Ability » Basic Algebra
Question
What is the solution to ?
Choices
Choice (4)  Response  

a.  15 

b.  35 

c.  45 

d.  25 

Question number: 109
» Mental Ability » Basic Algebra
Question
What is the slope of the line ?
Choices
Choice (4)  Response  

a.  4 

b.  5 

c. 


d. 


Question number: 110
» Mental Ability » Basic Algebra
Question
Distance between the points (8, 10) and (4, 5) is
Choices
Choice (4)  Response  

a. 


b.  400 

c. 


d. 


Question number: 111
» Mental Ability » Basic Algebra
Question
If , find the value of .
Choices
Choice (4)  Response  

a.  32 

b.  45 

c.  34 

d.  25 

Question number: 112
» Mental Ability » Basic Algebra
Question
Secants and intersect the circle at R and O respectively. What is the length of ?
Choices
Choice (4)  Response  

a. 


b.  17 

c.  26 

d. 


Question number: 113
» Mental Ability » Number Games » Number Series
Question
In the following number series, how many 9’s are there which are preceded by 3 but not followed by 4?
2 3 9 5 1 3 9 6 7 3 9 4 8 9 3 4 9 3 2 3 9 8 3 9 3
Choices
Choice (4)  Response  

a.  3 

b.  4 

c.  1 

d.  2 

Question number: 114
» Mental Ability » Basic Algebra
Question
What is the solution to ?
Choices
Choice (4)  Response  

a.  14 

b.  34 

c.  34 

d.  14 
