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⁞ Averages

Aptitude ➤ Averages ➤ 2
Question 11
Q11.  The mean of 12, 22, 32, 42, 52, 62, 72 is :
 

Answer :  20


No Explanation Available. You may discuss in the comment box.
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Question 12
Q12.  The average of a non-zero number and its square is 5 times the number. The number is :
 

Answer :  9


No Explanation Available. You may discuss in the comment box.
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Question 13
Q13.  The average of 7 consecutive numbers is 20. The largest of these numbers is :
 

Answer :  23


No Explanation Available. You may discuss in the comment box.
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Question 14
Q14.  The average of 5 consecutive odd numbers is 61. What is the difference between the highest and lowest numbers ?
 

Answer :  8


No Explanation Available. You may discuss in the comment box.
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Question 15
Q15.  The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is :
 

Answer :  Cannot be computed with the given information.


Clearly, to find the average, we ought to know the number of boys, girls or students in the class, neither of which has been given.
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