Question

What is the sum of all the positive integers up to $100$, inclusive?

• A. $5048$
• B. $1220$
• C. $3250$
• D. $5050$

Answer 1

The correct option is D $5050$

We know,

Sum of n positive integers $=\frac{n(n+1)}{2}$

Here, $n=100$

$\therefore$ Sum $=\frac{100(100+1)}{2}$

$=\left(50\right)\left(101\right)=5050$ (Ans $\to$ D)