In a queue,Vijay is $14^{th}$ from the front and Jack is $17^{th}$ from the end,while Mary is in between Vijay and Jack. If Vijay is ahead of Jack and there are $48$ persons in the queue,how many persons are there between Vijay and Mary?

In the following series of numbers,find out how many times $1, 3$ and $7$ have appeared together,with $7$ being in the middle and $1$ and $3$ on either side of $7$?
$2, 9, 7, 3, 1, 7, 3, 7, 7, 1, 3, 3, 1, 7, 3, 8, 5, 7, 1, 3, 7, 7, 1, 7, 3, 9, 0, 6$

Among $A, B, C, D$ and $E$ each having a different weight,$D$ is heavier than $A$ and $E$,and $B$ is lighter than $C$. Who among them is the heaviest?

$(I)$ Kamal is available at home from $12$ noon to $4$ $p.m.$ on Tuesday,Thursday,and Sunday.
$(II)$ His younger brother Navin is available at home on Monday,Thursday,Friday,and Sunday between $10$ $a.m.$ to $2$ $p.m.$
$(III)$ The eldest brother Rajiv is available between $9$ $a.m.$ to $12$ noon on Monday,Wednesday,and Thursday and $2$ $p.m.$ to $4$ $p.m.$ on Friday,Saturday,and Sunday.
On which day of the week are all three brothers available at home at the same time?

$A$ number is greater than $3$ but less than $8$. Also,it is greater than $6$ but less than $10$. The number is

How many days will there be from $26^{th}$ January,$1988$ to $15^{th}$ May,$1988$ (both days included)?