Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 7): Questions 33  39 of 122
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Question number: 33
» Mental Ability » Basic Arithmetic
Question
Which of the following is in descending order?
Choices
Choice (4)  Response  

a. 


b.  , , 

c.  , , 

d.  None of the above 

Question number: 34
» Mental Ability » Basic Arithmetic
Question
The average of 3 results is 10 and that of the first two is 5. The third result is________.
Choices
Choice (4)  Response  

a.  1 

b.  12.5 

c.  20 

d.  50 

Question number: 35
» Mental Ability » Basic Arithmetic
Question
400 liters of milk is divided in two parts having ratio X: 20, if the first part is 200 liters, find x.
Choices
Choice (4)  Response  

a.  20 

b.  42 

c.  39 

d.  41 

Question number: 36
» Mental Ability » Basic Arithmetic
Question
Which of the following number is prime?
Choices
Choice (4)  Response  

a.  119 

b.  247 

c.  187 

d.  All a. , b. and c. are correct 

Question number: 37
» Mental Ability » Basic Arithmetic
Question
The ratio of the number of boys and girls in a college is 5: 6. If the percentage increase in the number of boys and girls be 10 % and 15 % respectively, what will be the new ratio?
Choices
Choice (4)  Response  

a.  5: 9 

b.  21: 22 

c.  8: 9 

d.  23: 24 

Question number: 38
» Mental Ability » Basic Arithmetic
Question
Find the value of in each of the following equations
Choices
Choice (4)  Response  

a.  0.5 

b.  5.4 

c.  0.6 

d.  1.6 

Question number: 39
» Mental Ability » Basic Arithmetic
Question
An ore contain 5 % Iron. How many kilograms of the ore are required to get 70 kg of Iron?
Choices
Choice (4)  Response  

a.  1.44 kg 

b.  850 kg 

c.  544 kg 

d.  1400 kg 
