A number AABB is the square of an integer. Find this integer, aided by pen and paper. No other calculating aids allowed.
(In reply to
solution by Charlie)
Charlie,
In an attempt at provoking additional thought:
Granting the accuracy of your solution, it raises the question of what
might bring to one's mind the observation that AABB can be rewritten as
11 x A0B. That is, what was the thought process behind the
observation?
re: solution
