Difference between revisions of "2009 UNCO Math Contest II Problems/Problem 2"

Revision as of 08:45, 26 November 2016

(a) Let $Q_n=1^n+2^n$ . For how many $n$ between $1$ and $100$ inclusive is $Q_n$ a multiple of $5$ ?

(b) For how many $n$ between $1$ and $100$ inclusive is $R_n=1^n+2^n+3^n+4^n$ a multiple of 5?

This problem needs a solution. If you have a solution for it, please help us out by adding it.

@@ Line 8: / Line 8: @@
 == Solution ==
+{{solution}}
 == See also ==

2009 UNCO Math Contest II (Problems • Answer Key • Resources)
Preceded by Problem 1	Followed by Problem 3
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10
All UNCO Math Contest Problems and Solutions