On a playground, some men were playing football. In that group, 5 men were grandfathers of someone else in the group, 15 men were fathers of someone else in the group, and 15 men were sons of someone else in the group. What is the minimum number of men on the playground?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
No explanations have been posted yet. Check back later!