2009
Problem 11445.
Am. Math. Mon., 2009

2006
Powers of Consecutive Integers: 11121.
Am. Math. Mon., 2006

Finding a Repeated Difference: 11084.
Am. Math. Mon., 2006

2004
Graceful Permutations Revisited: 10964.
Am. Math. Mon., 2004

Problem 11121.
Am. Math. Mon., 2004

Problem 11084.
Am. Math. Mon., 2004

2002
Problem 10964.
Am. Math. Mon., 2002