Mental Ability (NCO Cyber Olympiad (SOF) Class 9): Questions 124  131 of 219
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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 

Question number: 126
» Mental Ability » Basic Algebra
Question
What is equivalent to ?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  10abc 

Question number: 127
» Mental Ability » Ranking Test
Question
Avinash is Ravi’s eldest brother. Ravi is younger than Ajay. Ravi and Ajay are not brothers. Which of the following statements is definitely true?
Choices
Choice (4)  Response  

a.  Ajay is younger than Avinash 

b.  Avinash is younger than Ajay 

c.  Ajay is younger than Ravi 

d.  None of the above 

Question number: 128
» Mental Ability » Basic Algebra
Question
If , find the value of
Choices
Choice (4)  Response  

a.  322 

b.  324 

c.  323 

d.  325 

Question number: 129
» Mental Ability » Basic Arithmetic
Question
Given, , and find the value of the following expression correct up to three places of decimal: .
Choices
Choice (4)  Response  

a.  17 

b.  12 

c.  10 

d.  30 

Question number: 130
» Mental Ability » Basic Algebra
Question
is a factorization product of
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 131
» Mental Ability » Basic Arithmetic
Question
Divide 45 among four parts such that 2 added to first part, 2 subtracted from second part, third multiplied by 2 and the fourth divided by2 are all equal.
Choices
Choice (4)  Response  

a.  5, 8, 12, 20 

b.  8, 12, 5, 20 

c.  12, 8, 5, 20 

d.  20, 5, 8, 12 
