The average of three numbers is $135 .$ The largest number is $195$ and the diference between the other two is $20 .$ The smallest number is

If the average of $m$ numbers is $n^{2}$ and that of $n$ numbers is $m^{2}$, then the average of $( m + n )$ numbers is

The average age of a family of $6 \,members\, 4 \,year$ ago was $25 \,years.$ Mean while a child was born in this family and still the average age of the whole family is same today. The present age of the child is in $years$ $?$

The average age of a cricket team reduces by $2$ when two senior players aged $32$ and $30$ are replaced by $2$ youngsters of equal age. What is the age of these players?

The average of consecutive numbers is $n .$ If the next two consecutive numbers are also included, the average of the five numbers will

A cyclist goes from a place to another and returns by the same route. He pedals his way uniformly with speed $u$ while going and with speed $v$ while returning. The average speed of his journey is