$92^{2} - 12^{2} = 3535 + ?$

What least number must be added to $7231$ so that the resulting number is exactly divisible by $5$ and $9$ together?

The nearest whole number to one million which is divisible by $537$ is

$6894.986 + 5025.005 + 600.020 = ?$

Let $x$ be the least number,which when divided by $5, 6, 7$ and $8$ leaves a remainder $3$ in each case,but when divided by $9$ leaves no remainder. The sum of the digits of $x$ is:

$A$ number exceeds its two-fifths by $75$. The number is: