CHRISTmaths is a creative math problem solving book with a recreational flavor, by leveraging on the Christmas theme to posing and solving nonroutine math problems. The 196-page fun book would appeal to: * readers wishing to brush up their mathematical problem-solving skills in a fun and recreational manner; * problem solvers wanting to experience some aha! moments while solving some fertile questions; * students and mathletes longing for some creative mathematics as they flee from drill-and-kill assessment books. CHRISTmaths answers questions such as these: What day of the week is Christmas in 2025? How many zeros are there in 1 x 2 x 3 x ... x 24 x 25? Was Pythagoras a pre-Christian Christian? 12 Challenges @ Christmastime ... 25 Mathematical Quickies & Trickies Xmas Philamath The 12 Puzzles of Christmas ... Christmas Tangrams CHRISTMAS Alphabetics The Twelve Days of Christmas .... and many more.