Mental Ability (NCO Cyber Olympiad Class 7): Questions 20  26 of 205
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Question number: 20
» 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: 21
» 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: 22
» 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: 23
» Mental Ability » Basic Statistics
Question
A man sold a radio for Rs. 1980 and gained 10%. The radio was bought for
Choices
Choice (4)  Response  

a.  Rs. 2178 

b.  Rs. 1800 

c.  Rs. 2000 

d.  Rs. 1782 

Question number: 24
» Mental Ability » Basic Statistics
Question
Sanket travels 8 km to the East. Then he turns to the right and walks 5 km. Then again, he turns to his right and moves 8 km forward. How many km away is he from the starting point?
Choices
Choice (4)  Response  

a.  5 km 

b.  3 Km 

c.  10 km 

d.  2 km 

Question number: 25
» 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: 26
» 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 
