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Question 1:

The average of 21, 28 and $x$ is 54. What is the value of $\mathrm{x}$?

Question 2:

If the average of 53,67,86,42,75 and x is 65. Then what is the value of x ?

Question 3:

What is the average of first 300 natural numbers?

Question 4:

Average age of 12 members in a family is 40 years. Age of youngest member and second youngest member of the family is 2 years and 3 years respectively. Find the average age of family just before the birth of second youngest member .

Question 5:

Find the average of reciprocals of $\mathrm{x}, \mathrm{y}$ and $z:$

Question 6:

Find the average of the following set of digits 232,149,208,301,399,415

Question 7:

The average height of some students in a group is $160 \mathrm{~cm}$. If 6 students of average height $166 \mathrm{~cm}$ join the group, then the average height of all the students in the group increases by $8 \mathrm{~mm}$, What is the number of students in the group, initially?

Question 8:

The average of 6 consecutive odd numbers is 64 then what will be the the difference of largest and smallest number.

Question 9:

Average of all even numbers between 104 and 138 is …..

Question 10:

In a class average weight of 70 Boys is $51 \mathrm{~kg}$ and average weight of 30 girls is $47 \mathrm{~kg}$. Find out the average weight of the whole class: