What is the smallest $6$-digit number that is completely divisible by $108$?

The sum of four numbers is $64.$ If you add $3$ to the first number,$3$ is subtracted from the second number,the third is multiplied by $3,$ and the fourth is divided by $3,$ then all the results are equal. What is the difference between the largest and the smallest of the original numbers?

What is the unit digit in $\{(6374)^{1793} \times (625)^{317} \times (341)^{491}\}?$

If the sum of two numbers,one of which is $\frac{2}{5}$ times the other,is $50,$ then the numbers are

$\frac{(0.146+0.092)^{2}+(0.092-0.146)^{2}}{0.073 \times 0.073+0.046 \times 0.046}$ is equal to

$\frac{4}{3}$ of a certain number is $64$. Half of that number is