Mental Ability (NCO Cyber Olympiad Class 7): Questions 80  85 of 205
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Question number: 80
» Mental Ability » Basic Arithmetic
Question
Which is greatest in
Choices
Choice (4)  Response  

a.  0.15 

b. 


c. 


d.  None of the above 

Question number: 81
» Mental Ability » Basic Arithmetic
Question
An ore contain 8 % copper. How many kilograms of the ore are required to get 68 kg of copper?
Choices
Choice (4)  Response  

a.  85 kg 

b.  850 kg 

c.  544 kg 

d.  5.44 kg 

Question number: 82
» Mental Ability » Basic Arithmetic
Question
The cost of cultivating a square field at the rate of rupees 360 per hectare is rupees 3240. What is the cost of putting a fence around it at 75 paise per meter?
Choices
Choice (4)  Response  

a.  600 rupees 

b.  900 rupees 

c.  700 rupees 

d.  800 rupees 

Question number: 83
» Mental Ability » Basic Arithmetic
Question
If 30 men working 8 hours a day can do a piece of work in 15 days, in how days will 15 men working for 7 hours a day to do the same piece of work?
Choices
Choice (4)  Response  

a.  55 days 

b.  34.28 days 

c.  30 days 

d.  12 days 

Question number: 84
» Mental Ability » Number Games
Question
The product of two numbers is 25 and the sum of their squares is 125. The sum of the number is.
Choices
Choice (4)  Response  

a.  21.21 

b.  13.22 

c.  16.90 

d.  None of the above 

Question number: 85
» Mental Ability » Basic Algebra
Question
If and be any two rational numbers then we define:
Thus, subtracting a rational number means adding its additive inverse. Based on the statement given above solve the following Problem: Subtract from.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

