Question

Find the sum of first $10$ natural numbers.

Answer 1

Finding the sum:

The sum of the first $10$ natural numbers is given by the formula:

$S_n=\frac{n(n+1)}{2}$

Here $n=10$

$$\begin{gathered} \Rightarrow S=\frac{10(10+1)}{2} \\ \Rightarrow S=\frac{10\times 11}{2} \\ \Rightarrow S=5\times 11 \\ \Rightarrow S=55 \end{gathered}$$

Hence, the sum of the first $10$ natural numbers is $55$.