Hemang is $16^{th}$ from the top and $12^{th}$ from the bottom in merit in the class. How many students are there in the class?

In a row of children facing North,Ritesh is $12^{th}$ from the left end. Sudhir,who is $22^{nd}$ from the right end,is $4^{th}$ to the right of Ritesh. How many children are there in the row in total?

Ram remembers that Lakshman's birthday is after $19^{th}$ but before $22^{nd}$ November,whereas Anil remembers that Lakshman's birthday is after $20^{th}$ but before $24^{th}$ November. Which day is Lakshman's birthday?

In a row of trees,one tree is fifth from either end of the row. How many trees are there in the row?

$1.12.91$ is the first Sunday. Which is the fourth Tuesday of December $91$ (in $.91$)?

In a row of ten boys, when Rohit was shifted by two places towards the left, he became seventh from the left end. What was his earlier position from the right end of the row?