<PRE><B>Question 1064311</B>
 prove that 16^4-2^13-4^5 is divisible by 11
-------
(2^4)^4 - 2^13 - (2^2)^5= 2
-----
2^16 - 2^13 - 2^10
--------
2^10[2^6 - 2^3 - 1]
--------
2^10[64-8-1]
--------
= 2^10[55]
-----
Since 55 is divisible by 11, the original number is
divisible by 11
----------------
Cheers,
Stan H.
-------------</PRE>