11 - One more than 10, 14 - One ten and four ones, 12 - One less than 13, 18 - 8 more then 10, 17 - One ten and seven ones, 19 - One less than 20, 13 - Three more than 10, 15 - Two less then 17, 16 - Six more than 10, 20 - Two more than 18,

Mystery Number

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