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

$(21.5 \% \text{ of } 999)^{1/3} + (42 \% \text{ of } 601)^{1/2} + ? = 28$ (Assuming the equation equals $28$ for a standard evaluation)

$A$ number when divided by $357$ gives a remainder $37.$ By dividing the same number by $17,$ the remainder would be

$\frac{(0.188+0.077)^{2}+(0.188-0.077)^{2}}{0.188 \times 0.188+0.077 \times 0.077} = ?$

Let $x$ be the smallest number,which when added to $2000$ makes the resulting number divisible by $12, 16, 18$ and $21$. The sum of the digits of $x$ is

$3648.24 + 364.824 \div ? - 36.4824 = 3794.1696$