A Differential Equation with Many Solutions: 10747. - Athanasios Kalakos; Michel Bataille; David M. Wells (Am. Math. Mon., 2000)

Problem 11044. - Michel Bataille (Am. Math. Mon., 2003)

A Root Inequality: 10944. - Marcin Mazur; Roberto Tauraso; Michel Bataille (Am. Math. Mon., 2003)

Problem 11094. - Michel Bataille (Am. Math. Mon., 2004)

Problem 11163. - Michel Bataille (Am. Math. Mon., 2005)

A Combinatorial Sum Goes on Tangent: 11044. - Michel Bataille; Li Zhou 001 (Am. Math. Mon., 2005)

Morley's Triangle and Lemma: 11038. - Floor van Lamoen; Michel Bataille (Am. Math. Mon., 2005)

Problem 11217. - Michel Bataille (Am. Math. Mon., 2006)

Problem 11239. - Michel Bataille (Am. Math. Mon., 2006)

Simple Roots for Polynomials: 11094. - Michel Bataille; O. P. Lossers (Am. Math. Mon., 2006)

Problem 11317. - Michel Bataille (Am. Math. Mon., 2007)

Counting Lattice Quadrilaterals Tangent to an Ellipse: 11163. - Michel Bataille; Richard Stong (Am. Math. Mon., 2007)

Finding the Greatest Lower Bound: 11217. - Michel Bataille; Richard Stong (Am. Math. Mon., 2007)

If AB Preserves A, then BA Preserves B: 11239. - Michel Bataille; John W. Hagood (Am. Math. Mon., 2008)

A Permanent Lower Bound: 11253. - David Beckwith; Michel Bataille (Am. Math. Mon., 2008)

Perimeter by Integral: 11256. - Finbarr Holland; Michel Bataille (Am. Math. Mon., 2008)

Problem 11449. - Michel Bataille (Am. Math. Mon., 2009)

From Quadrilateral to Trapezoid: 11317 [2007, 745]. - Michel Bataille; John Cade (Am. Math. Mon., 2009)

Van Aubel's Theorem: 11328 [2007, 925]. - Dmitris Vartziotis; Michel Bataille (Am. Math. Mon., 2009)