Home > Just Math
|Power of two (Posted on 2010-05-12)
Given a sequence of of natural numbers
a1, a2, a3, ...
such that a1 is not a multiple of 5
and a(n+1)=a(n)+(the last digit of a(n)).
Prove that this sequence contains infinitely many integer powers of 2.
You must be logged in to post comments.)
Please log in:
About This Site
New Comments (5)
Top Rated Problems
This month's top
Most Commented On