Problem 10783. - Wu Wei Chao (Am. Math. Mon., 2000)

Incenters and Excenters: 10693. - Wu Wei Chao; Michael Reid; F. Bellot Rosado; Robin J. Chapman; Daniele Donini; Shalosh B. Ekhad; N. Lakshmanan; O. P. Lossers; Albert Nijenhuis; Peter Nüesch; C. G. Petalas (Am. Math. Mon., 2000)

When Quadrilaterals Have Inscribed Circles: 10698. - Wu Wei Chao; Plamen Simeonov (Am. Math. Mon., 2000)

Problem 10854. - Wu Wei Chao (Am. Math. Mon., 2001)

Problem 10862. - Wu Wei Chao (Am. Math. Mon., 2001)

Problem 10874. - Wu Wei Chao (Am. Math. Mon., 2001)

Problem 10898. - Wu Wei Chao (Am. Math. Mon., 2001)

Problem 10908. - Wu Wei Chao (Am. Math. Mon., 2001)

Concurrent Lines in a Cyclic Quadrilateral: 10783. - Wu Wei Chao; Daniele Donini (Am. Math. Mon., 2001)

The Median Meets the Circle of Appolonius: 10862. - Wu Wei Chao; Geoffrey A. Kandall (Am. Math. Mon., 2002)

A Functional Equation: 10908. - Wu Wei Chao; Richard Stong; Doyle Henderson (Am. Math. Mon., 2002)

Parallelogram Circumcenters: 10874. - Wu Wei Chao; Li Zhou 001 (Am. Math. Mon., 2002)

Problem 10988. - Wu Wei Chao (Am. Math. Mon., 2003)

Problem 10996. - Wu Wei Chao (Am. Math. Mon., 2003)

Problem 11023. - Wu Wei Chao (Am. Math. Mon., 2003)

Problem 11053. - Wu Wei Chao (Am. Math. Mon., 2003)

Divisibility Conditions Holding as Many Times as You Want: 10898. - Wu Wei Chao; Gerry Myerson (Am. Math. Mon., 2003)

Problem 11061. - Wu Wei Chao (Am. Math. Mon., 2004)

Problem 11082. - Wu Wei Chao (Am. Math. Mon., 2004)

Continuous Additive Functions: 10854. - Wu Wei Chao; Doyle Henderson (Am. Math. Mon., 2004)

An Iterative Sequence: 10988. - Wu Wei Chao; Doyle Henderson; John H. Lindsey II (Am. Math. Mon., 2004)

Gossard Perspector: 10980. - Ye Zhong Hao; Wu Wei Chao; J. Schaer (Am. Math. Mon., 2004)

Two Functional Equations: 11053. - Wu Wei Chao (Am. Math. Mon., 2005)

Errata: Continuous Additive Functions. - Wu Wei Chao (Am. Math. Mon., 2005)

A Timely Problem: 11023. - Wu Wei Chao; Nadjib Bouzar; Allan K. Swett (Am. Math. Mon., 2005)

Point Causing Equal Angles: 10996. - Wu Wei Chao; O. P. Lossers (Am. Math. Mon., 2005)

Problem 11205. - Wu Wei Chao; Guang Zhou (Am. Math. Mon., 2006)

A Divisibility Problem: 11082. - Wu Wei Chao; et al. (Am. Math. Mon., 2006)

A Triangle Inequality: 11205. - Wu Wei Chao; Pál Péter Dályay (Am. Math. Mon., 2007)