Kow-Cheong Yan wrote a monthly mathematics column for primary school pupils since 2003. The last few issues were:
Yan, Kow-Cheong (2010). Three Make a Pair. YG (Young Generation), 352, 8-10.
Yan, Kow-Cheong (2010). Smile with Maths. YG (Young Generation), 351, 8-10.
Yan, Kow-Cheong (2010). Patterns with Paper and String. YG (Young Generation), 334, 8-11.
Yan, Kow-Cheong (2009). How Big Is a Googol? YG (Young Generation), 333, 8-11.
Yan, Kow-Cheong (2009). Guesstimation: Mathematics at the Back of an Envelope. YG (Young Generation), 332, 8-10.
Yan, Kow-Cheong (2009). What’s Next? YG (Young Generation), 331, 12-15.
Yan, Kow-Cheong (2008). Palindromania. YG (Young Generation), 327, 7-9.
Yan, Kow-Cheong (2008). More Mnemonics in Mathematics. YG (Young Generation), 326, 10-12.
Yan, Kow-Cheong (2008). Tricks on April Fool’s Day. YG (Young Generation), 324, 9-12.
Some YG articles that were resold in the United States were:
Yan, Kow-Cheong (2005). Egyptian fractions. YG (Young Generation), 289, 14-15.
Yan, Kow-Cheong (2004). A mathematical beauty contest. YG (Young Generation), 279, 34-35.
Yan, Kow-Cheong (2004). What's odd about odd numbers? YG (Young Generation), 274, 16-17.
Yan, Kow-Cheong. (2004). Crop circles. YG (Young Generation), 273, 22-23.
Yan, Kow-Cheong. (2003). A formula for Christmas day. YG (Young Generation) 272, 12.
Yan, K. C. (2003). Your hairs are numbered. YG (Young Generation), 267, 42-43.
Yan, Kow-Cheong. (2003). Is 2003 a leap year? YG (Young Generation) 264, 42-43.