Question

Write the natural numbers from$10$ to $25$. What fraction of them are composite numbers?

Answer 1

The natural numbers from $10$ to $25$ are $11,12,13,14,15,16,17,18,19,20,21,22,23$ and $24$.

The composite numbers from $10$ to $25$ are $12,14,15,16,18,20,21,22,24$.

Thus, out of $14$ natural numbers, $9$ are composite numbers.

Therefore, fraction of the composite numbers is $\frac{9}{14}$.