The $15^{th}$ term of the arithmetic progression $4 + 9 + 14 + 19 + \dots$ is......

The sum of $3+5+7+\ldots$ to $n$ terms is:

If the $n^{th}$ term of an arithmetic progression is $3n - 1$,then the sum of its first five terms is.......

If the sum of two extreme numbers of an $A.P.$ with four terms is $8$ and the product of the remaining two middle terms is $15$,then the greatest number of the series will be:

What is the sum of all numbers between $100$ and $300$ that are divisible by $7$?

The four arithmetic means between $3$ and $23$ are.....