The average of $3$ consecutive odd numbers is $14$ more than one third of the first of these numbers, what is the last of these numbers?
$17/19/15/$data inadequate/none of these
Let three consecutive odd numbers be $a-2,a,a+2$. Their average is $a.$ So, $a=\frac13(a-2)+14\implies a=20.$ But that's not possible as $a$ is odd.
What am I missing?