Mental AbilityBasic Arithmetic (NCO Cyber Olympiad (SOF) Class 7): Questions 62  68 of 122
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Question number: 62
» Mental Ability » Basic Arithmetic
Question
6 children and 10 men completed a certain piece of work in 12 days. Each children takes twice the time taken by a man to finish the work. In how many days will 10 men finish the same work?
Choices
Choice (4)  Response  

a.  8 

b.  15.6 

c.  12.5 

d.  9 

Question number: 63
» Mental Ability » Basic Arithmetic
Question
Convert the 0.25 into vulgar fractions
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 64
» Mental Ability » Basic Arithmetic
Question
A train 360 m long is running at a speed of . In what time will it pass a bridge 140 m long?
Choices
Choice (4)  Response  

a.  48 sec 

b.  45 sec 

c.  40 sec 

d.  42 sec 

Question number: 65
» Mental Ability » Basic Arithmetic
Question
Which of the following can be the exact multiple of 2?
Choices
Choice (4)  Response  

a.  27 

b.  15 

c.  63 

d.  12 

Question number: 66
» Mental Ability » Basic Arithmetic
Question
The cost of cultivating a square field at the rate of rupees 250 per hectare is rupees 3650. What is the cost of putting a fence around it at 25 paise per meter?
Choices
Choice (4)  Response  

a.  425.6 rupees 

b.  200 rupees 

c.  382.09 rupees 

d.  320 rupees 

Question number: 67
» Mental Ability » Basic Arithmetic
Question
Human blood RBC’s are expressed in terms of number of red blood cells per cubic mm. Express 8.8 million blood cells per cubic mm terms of scientific notation.
Choices
Choice (4)  Response  

a.  8.8 

b.  88 

c.  0.88 

d.  0.88 

Question number: 68
» Mental Ability » Basic Arithmetic
Question
Which of the following can be the exact multiple of 3?
Choices
Choice (4)  Response  

a.  28 

b.  17 

c.  63 

d.  13 
