Mental AbilityBasic Arithmetic (NCO Cyber Olympiad Class 7): Questions 9  15 of 122
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Question number: 9
» Mental Ability » Basic Arithmetic
Question
The average weight of 25 students in class 8^{th} of a school is 42 kg. Two new students, each of whom weighed 52 kg and 68 kg respectively were admitted in the class. Find the new average weight of the students in the class.
Choices
Choice (4)  Response  

a.  43.33 kg 

b.  42.2kg 

c.  45.7kg 

d.  40 kg 

Question number: 10
» Mental Ability » Basic Arithmetic
Question
The average of 6 results is 50 and that of the first five is 46. The sixth result is________.
Choices
Choice (4)  Response  

a.  70 

b.  12.5 

c.  10 

d.  1 

Question number: 11
» Mental Ability » Basic Arithmetic
Question
A number divided by 3 is 7 less than that number, what is the number?
Choices
Choice (4)  Response  

a.  25 

b.  15 

c.  10.5 

d.  20 

Question number: 12
» Mental Ability » Basic Arithmetic
Question
Which of the following number is not prime?
Choices
Choice (4)  Response  

a.  187 

b.  247 

c.  180 

d.  None of the above 

Question number: 13
» Mental Ability » Basic Arithmetic
Question
The average weight of 20 students in class 9^{th} of a school is 35 kg. Two new students, each of whom weighed 42 kg and 52 kg respectively were admitted in the class. Find the new average weight of the students in the class.
Choices
Choice (4)  Response  

a.  40 kg 

b.  36.1 kg 

c.  43.33 kg 

d.  42.2kg 

Question number: 14
» Mental Ability » Basic Arithmetic
Question
In an examination, one should get 40 % of the maximum marks to pass. A student obtains 150 marks and declared failed by 45 marks. The maximum marks are
Choices
Choice (4)  Response  

a.  640 

b.  487.5 

c.  1008 

d.  500 

Question number: 15
» Mental Ability » Basic Arithmetic
Question
If ( ) = ( ), then =?
Choices
Choice (4)  Response  

a.  6 

b.  8 

c.  5 

d.  3 
