Raman ranks sixteenth from the top and forty-ninth from the bottom in a class. How many students are there in the class?

Below is given a number series:
$1, 8, 5, 7, 2, 9, 8, 4, 3, 6, 2, 7, 5, 1, 8, 9, 4, 3, 6, 5, 9$
How many instances are there in which an even number is followed by two odd numbers?

In the series given below,count each $5$ which is not immediately preceded by $3$ but is immediately followed by $7$. How many such $5$ are there?
$1, 5, 7, 3, 5, 7, 4, 7, 3, 7, 2, 5, 6, 5, 8, 5, 7, 4, 5, 6, 5, 5, 7, 1, 5, 7, 7, 5, 5$

How many numbers from $1$ to $100$ are there,each of which is not only exactly divisible by $4$ but also has $4$ as a digit?

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?

$M$ is older than $R$. $Q$ is younger than $R$ and $N$. $N$ is not as old as $M$. Who among $M, N, R$,and $Q$ is the oldest?