Question

The sum of all the even numbers between $1$ and $51$ is

• A. $1300$
• B. $650$
• C. $325$
• D. $675$
• E. none of these

Answer 1

Answer: (B)

$650$

The sum of all even numbers between $1$ and $51$ is $2+4+6+....50$

$=2(1+2+3+...25)$

$=\frac{2\left(25\right)\left(26\right)}{2}$

$=650$