Question

The sum of the digits of all the natural numbers from $1$ to $300$ is equal to

• A. $45,150$
• B. $3003$
• C. $3033$
• D. $45,679$

Answer 1

The correct option is A $45,150$

$\Rightarrow$$\sum _1^{300}n=\frac{n(n+1)}{2}$

$=\frac{300\times 301}{2}=45,150$.