Mental Ability (NCO Cyber Olympiad Class 9): Questions 120  125 of 219
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Question number: 120
» Mental Ability » Number Games » Number Analogies
Question
Match the following
ListⅠ ( List I  ListⅡ ( List II 

(A)
 (i) Irrational 
(B)
 (ii) Irrational 
(C)
 (iii) Irrational 
(D) 0.5555…  (iv) Irrational 
Choices
Choice (4)  Response  

 
a. 
 
b. 
 
c. 
 
d. 

Question number: 121
» Mental Ability » Basic Algebra
Question
If is factor of , find the value of q.
Choices
Choice (4)  Response  

a.  30  
b.  30  
c.  29  
d.  29 
Question number: 122
» Mental Ability » Basic Geometry
Question
How many circles of 3 cm radius can be drawn through each of three given 3 points as center of the circle?
Choices
Choice (4)  Response  

a.  Infinity  
b.  3 only  
c.  9 only  
d.  All of the above 
Question number: 123
» Mental Ability » Basic Arithmetic
Question
The bacteria in a culture grows by 20 % in the first hour, decreases by 10 % in the second hour and again increases by 20 % in the third hour. If at the end of the third hour the count of bacteria is 100000. The original count of bacteria in the sample is________
Choices
Choice (4)  Response  

a.  129300  
b.  129000  
c.  129900  
d.  129600 
Question number: 124
» Mental Ability » Basic Algebra
Question
If is factor of , find the value of a.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 125
» Mental Ability » Basic Arithmetic
Question
Sterling gold is 92.5 % pure gold. How many grams of sterling gold must be mixed to a 90 % gold alloy to obtain a 500 gm of a 91 % gold alloy?
Choices
Choice (4)  Response  

a.  100 gm  
b.  50 gm  
c.  150 gm  
d.  200 gm 