Question 1071983
If at age 6, the younger brother was half of the age of the speaker,
at that point in time, the speaker's age was {{{2*6=12}}} ,
and the age difference between them was {{{12-6=6}}} years.
The difference in age will continue to be {{{6}}} years.
The speaker says "now I am 60".
If that is a true statement,
the same younger brother of the speaker is now
{{{60-6=highlight(54)}}} .
 
We have no information about the speaker's sons' ages.
We just know that one is at least 3, and the another one  is at least {{{2*3=6}}} .
Maybe when a younger son turned 3 yesterday, while another son was 6.
Maybe that happened a year ago,
or 10 years ago, or 30 years ago.