The number 11 is especially popular in our southern provinces because Prince Carnival is announced everywhere on 11-11 at 11:11 am. However, 11 is also the least palindromic number, the fifth prime and your target in Make 11! – a rather compelling name due to the exclamation mark for a rather sympathetic math game. You have four groups of empty squares in all cardinal directions and a number between -3 and +5 appears in the middle (and the next two are already visible). You need to move this to an empty group with the goal of making the total in it become 11. That sounds simpler than it is.
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Make 11! – Add numbers together to make 11