Question 1151329
let two numbers be {{{a}}} and {{{b}}}

if the average of two numbers is {{{15}}}, we have

{{{(a+b)/2=15}}}


{{{a+b=15*2}}}


{{{a+b=30}}}

so, numbers could be:

{{{a=1}}} and {{{b=30}}}

{{{a=2}}} and {{{b=28}}}
:
so on
:
{{{a=15}}} and {{{b=15}}}
:
so on
:
{{{a=30}}} and {{{b=1}}}