Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 7): Questions 95  101 of 122
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Question number: 95
» Mental Ability » Basic Arithmetic
Question
Human blood RBC’s are expressed in terms of number of red blood cells per cubic mm. Express 5.5 million blood cells per cubic mm terms of scientific notation.
Choices
Choice (4)  Response  

a.  55 

b.  5.5 

c.  5.5 

d.  0.55 

Question number: 96
» Mental Ability » Basic Arithmetic
Question
A train 500 meters long is running at a speed of 48 . If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is.
Choices
Choice (4)  Response  

a.  130 

b.  500 

c.  300 

d.  100 

Question number: 97
» Mental Ability » Basic Arithmetic
Question
Find the value of from the equation
Choices
Choice (4)  Response  

a.  62 

b.  35 

c.  45 

d.  33 

Question number: 98
» Mental Ability » Basic Arithmetic
Question
A man sold a radio for 1220 and gained 20%, then the radio was bought for?
Choices
Choice (4)  Response  

a.  1016.66 

b.  1200 

c.  980 

d.  1790 

Question number: 99
» Mental Ability » Basic Arithmetic
Question
Two cubes have volumes in the ratio 1: 125. Then the ratio of their sides is
Choices
Choice (4)  Response  

a.  1: 18 

b.  1: 2 

c.  1: 5 

d.  1: 8 

Question number: 100
» Mental Ability » Basic Arithmetic
Question
The present ages of three persons in proportions 2: 3: 4. Five years ago, the sum of their ages was 48. Find their present ages (in years).
Choices
Choice (4)  Response  

a.  16, 28, 26 

b.  8, 20, 28 

c.  14, 21, 28 

d.  None of the above 

Question number: 101
» Mental Ability » Basic Arithmetic
Question
Two poles 30 m and 15 m high stand upright in a ground. If their feet are 36 m apart, find the distance between tops.
Choices
Choice (4)  Response  

a.  30 m 

b.  39 m 

c.  35 m 

d.  25 m 
