Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 7): Questions 99  105 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: 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 

Question number: 102
» Mental Ability » Basic Arithmetic
Question
A boat covers a certain distance downstream in 2 hour, while it comes back in 1 hours. If the speed of the stream be 5 kmph, what is the speed of the boat in still water?
Choices
Choice (4)  Response  

a.  25 kmps 

b.  35 kmps 

c.  12 kmps 

d.  11 kmps 

Question number: 103
» Mental Ability » Basic Arithmetic
Question
The average age of 15 children in a class is 7 years. If the teacher’s age is included, the average age becomes 10 years. Find the teacher’s age.
Choices
Choice (4)  Response  

a.  55 

b.  42 

c.  35 

d.  45 

Question number: 104
» Mental Ability » Basic Arithmetic
Question
. If = 0.008, then will be ________
Choices
Choice (4)  Response  

a.  0.125 

b.  1 

c.  0.0625 

d.  0.20 

Question number: 105
» Mental Ability » Basic Arithmetic
Question
A shopkeeper declares a sale of electronics item, giving 15 % discount. If the net sale price of an electronic item is rupees 5000, what is its market price?
Choices
Choice (4)  Response  

a.  550 Rs. 

b.  952 Rs. 

c.  5882.35 Rs. 

d.  500 Rs. 
