Question

What is the sum of the first 50 natural numbers?

• A. 2550
• B. 1275
• C. 3000
• D. 3250

Answer 1

The correct option is B

1275

The sum of first $n$ natural numbers is given by
$S_n=\frac{n(n+1)}{2}.$
Here, $n=50.$
$\Rightarrow S_{50}=\frac{50(50+1)}{2}=\frac{50\times 51}{2}=25\times 51=1275$