How many multiples of $4$ lie between $10$ and $250$?

$A$ small terrace at a football ground comprises of $15$ steps each of which is $50 \, m$ long and built of solid concrete. Each step has a rise of $\frac{1}{4} \, m$ and a tread of $\frac{1}{2} \, m$. Calculate the total volume of concrete required to build the terrace (in $m^3$).

How many terms of the $AP: 24, 21, 18, \ldots$ must be taken so that their sum is $78$?

Write the first four terms of the $AP,$ when the first term $a$ and the common difference $d$ are given as follows: $a = -2, d = 0.$

In which of the following situations,does the list of numbers involved make an arithmetic progression,and why? The amount of money in the account every year,when ₹ $10000$ is deposited at compound interest at $8 \%$ per annum.

Subba Rao started work in $1995$ at an annual salary of ₹ $5000$ and received an increment of ₹ $200$ each year. In which year did his income reach ₹ $7000$?