Christmas card 2025

As usual, I spent some time this November, designing this year's Chalkdust puzzle Christmas card (with help from TD and Jacob). The card contains 12 puzzles: 8 in the green section, and 4 in the red or yellow section. By colouring the two squares on the front of the card containing every pair of digits in each answer(eg if an answer in the green section were 3305, you would colour the squares…