Question

The sum of three consecutive multiples of 7 is 777. Find these multiples

Answer 1

Let the number be $x$, $x+7$ and $x+14$ .

According to the given data,
$x+(x+7)+(x+14)=777$
$\Rightarrow 3x+21=777$
$\Rightarrow 3x=777-21$
$\Rightarrow 3x=756$
$\Rightarrow x=252$

Hence, the number is 252, 259 and 266.