The exercise was created 2018-09-13 by davidgunnarsson1. Question count: 10.
Normally, all words in an exercise is used when performing the test and playing the games. You can choose to include only a subset of the words. This setting affects both the regular test, the games, and the printable tests.
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https://spellic.com/eng/exercise/numbers-11-20-week-38-39.8419827.html