$\frac{1}{16}$ of $8432 + 50 \%$ of $? = 4429$

What is the least value of $K$ so that the number $6735K1$ is divisible by $9$?

The sum of three numbers is $68$. If the ratio between the first and second is $2:3$ and that between the second and third is $5:3$,then the second number is

$\frac{28 \times 36}{18 \% \text{ of } 50} = ?$

If $2 \frac{1}{2}$ is added to a number and the sum is multiplied by $4 \frac{1}{2}$,and $3$ is added to the product,and then dividing the sum by $1 \frac{1}{5}$,the quotient becomes $25$. What is the number?

How many numbers up to $500$ are divisible by $23$?