Abhishek ranks thirteenth in a class of thirty-one students. What is his rank from the last (in $19^{th}$)?

In a row of $21$ girls, when Anita was shifted by four places towards the right, she became $12^{th}$ from the left end. What was her earlier position from the right end of the row (in $^{th}$)?

How many days will there be from $26^{th}$ January,$1996$ to $15^{th}$ May,$1996$ (both days included)?

If the $25^{th}$ of August in a year is Thursday,the number of Mondays in that month is

In the following number sequence,how many such even numbers are there which are exactly divisible by its immediate preceding number but not exactly divisible by its immediate following number?
$3, 8, 4, 1, 5, 7, 2, 8, 3, 4, 8, 9, 3, 9, 4, 2, 1, 5, 8, 2$

If $3^{rd}$ December,$1990$ is Sunday,what day is $3^{rd}$ January,$1991$?