In the old days (mid to late 1970's), almost all of the scholarships require or were awarded to students with at least three A's (at GCE A levels).
In those days, there were very few students with four A's.
I heard that in recent years, there are hundreds of Singapore students with four A's at GCE A levels.
Not boasting, yours truly had only one A, and two B's, but was very fortunate to received a scholarship in the old days.