Among $P, Q, T, A$ and $B$ each having a different height,$T$ is taller than $P$ and $B$ but shorter than $A$ and $Q.$ $P$ is not the shortest. Who among them is the tallest?

If the position of the first and the sixth digits of the sequence of numbers $8, 9, 0, 3, 2, 1, 4, 6, 7, 5$ are interchanged,the second and the seventh and so on,which number would be seventh from the right end?

In a row of girls, Rita and Monika occupy the ninth place from the right end and tenth place from the left end, respectively. If they interchange their places, then Rita and Monika occupy the eighteenth place from the left end. How many girls are there in the row?

If it was Saturday on $17^{th}$ December,$1982$,what will be the day on $22^{nd}$ December,$1984$?

In a school,the following codes were used during physical exercise. $1$ means 'start walking',$2$ means 'keep standing',$3$ means 'start running at the same spot',$4$ means 'sit down'. How many times will a student who performs the following sequence without error from the beginning to the end have to sit down?
$1, 2, 3, 4, 2, 3, 1, 4, 4, 3, 2, 2, 1, 2, 4, 3, 1, 4, 4, 1, 2$

How many numbers from $11$ to $50$ are there which are exactly divisible by $7$ but not by $3$?