The sum of the first 24 natural numbers is:

The formula for the sum of the first $n$ natural numbers is given by:
$$S_n=\frac{n(n+1)}{2}$$

Given $n=24$:

$$S_{24}=\frac{24\times (24+1)}{2}$$

$$S_{24}=12\times 25=300$$

Thus, the sum of the first 24 natural numbers is 300.