Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 7): Questions 113  119 of 122
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 416 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 300.00 or
Question number: 113
» Mental Ability » Basic Arithmetic
Question
A man sold a radio for Rs. 1274 and gained 30%, the radio was bought for?
Choices
Choice (4)  Response  

a.  850 

b.  1790 

c.  1850 

d.  980 

Question number: 114
» Mental Ability » Basic Arithmetic
Question
28 % of 450 is ________.
Choices
Choice (4)  Response  

a.  140 

b.  112 

c.  126 

d.  125 

Question number: 115
» Mental Ability » Basic Arithmetic
Question
Human blood WBC’s are expressed in terms of number of red blood cells per cubic mm. Express 9.9 million blood cells per cubic mm terms of scientific notation.
Choices
Choice (4)  Response  

a.  99 

b.  0.99 

c.  0.99 

d.  9.9 

Question number: 116
» Mental Ability » Basic Arithmetic
Question
The ratio of the number of boys and girls in a college is 4: 3. If the percentage increase in the number of boys and girls be 17 % and 22 % respectively, what will be the new ratio?
Choices
Choice (4)  Response  

a.  12: 21 

b.  5: 9 

c.  21: 22 

d.  34: 33 

Question number: 117
» Mental Ability » Basic Arithmetic
Question
A boat covers a certain distance downstream in 1 hour, while it comes back in 1 hours. If the speed of the stream be 2 kmph, what is the speed of the boat in still water?
Choices
Choice (4)  Response  

a.  11 kmps 

b.  15 kmps 

c.  5 kmps 

d.  8 kmps 

Question number: 118
» Mental Ability » Basic Arithmetic
Question
What percent of is ?
Choices
Choice (4)  Response  

a.  20% 

b.  25% 

c.  0.4% 

d.  2.5% 

Question number: 119
» Mental Ability » Basic Arithmetic
Question
The present ages of three persons in proportions 3: 6: 9. Five years ago, the sum of their ages was 57. Find their present ages (in years).
Choices
Choice (4)  Response  

a.  12, 24, 36 

b.  18, 32, 15 

c.  15, 30, 45 

d.  All of the above 
