Question

Find two consecutive numbers whose sum is 115

Answer 1

Let the first consecutive number be $n$ then,

$n + (n+1) = 115$, since they are consecutive, n+1 is the next number.
$2n+1=115 \Rightarrow 2n = 114 \Rightarrow n=57$

Hence the two consecutive numbers that sum to 115 are 57 and 58.