Mental Ability (NCO Cyber Olympiad Class 9): Questions 137  141 of 219
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Question number: 137
» Mental Ability » Basic Algebra
Question
The distance between the points (2, 4) and (3, 8) is
Choices
Choice (4)  Response  

a. 


b.  169 

c.  18 

d.  13 

Question number: 138
» Mental Ability » Basic Arithmetic
Question
The sum of two angles of a triangles is 120° and their difference is 20°, find all the angles of the triangle.
Choices
Choice (4)  Response  

a.  40°, 50°, 90° 

b.  60°, 58°, 70° 

c.  50°, 40°, 90° 

d.  70°, 50°, 60° 

Question number: 139
» Mental Ability » Basic Arithmetic
Question
How many liters of 30 % alcohol solution should be added to 50 liters of a 60 % alcohol solution to make a 40 % solution?
Choices
Choice (4)  Response  

a.  100 liters 

b.  80 liters 

c.  40 liters 

d.  60 liters 

Question number: 140
» Mental Ability » Basic Geometry
Question
Select the figure from the four options, which when placed in the blank space of the problem figure would complete the pattern
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 141
» Mental Ability » Basic Algebra
Question
If , find the value of .
Choices
Choice (4)  Response  

a.  488 

b.  450 

c.  444 

d.  446 
