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Question 1.  the average weight of a class of 24 students is 35 kg. if the weight of the teacher be included, the average rises by 400g. the weight of the teacher is
  1.    25 kg
  2.    35 kg
  3.    45 kg
  4.    55 kg
Answer: Option C
Explanation :

Question 2.  average age of 6 sons of a family is 8 years. average age of sons together with their parents is 22 years. if the father is older than the mother by 8 years, the age of mother (in years) is
  1.    20 years
  2.    40 years
  3.    60 years
  4.    70 years
Answer: Option C
Explanation :

Question 3.  of three numbers, the second is twice the first and it is also thrice. if the average of these numbers is 44, the difference of the first numbers and the third number is
  1.    7
  2.    10
  3.    12
  4.    15
Answer: Option C
Explanation :

Question 4.  the average age of a man and his son is 41 years. the ratio of their ages 6 years ago was 5 : 2 respectively? what is the present age of son ?
  1.    24 years
  2.    25 years
  3.    26 years
  4.    27 years
Answer: Option C
Explanation :

Question 5.  what is the average of the following set of numbers ? 342, 410, 735, 280, 132, 17
  1.    307
  2.    318
  3.    330
  4.    345
Answer: Option D
Explanation :

Question 6.  if the average of the 1st and the 2nd of three numbers is d more than the average of the 2nd and 3rd number, what is the difference between the 1st and the 3rd number ?
  1.    11
  2.    13
  3.    15
  4.    18
Answer: Option D
Explanation :