Choose the correct answer Eighteen a 18 b c 16 Five a 13 b c.15 Nine a 11 b c 19 Twelve a 20 b 12 c 11 One a b c Fourteen a b 15 c 14 Sixteen a 16 b 17 c Seven a 17 b c Twenty a 11 b 20 c 12 Eleven a 10 b 11 c 12 Two a b c Thirteen a 20 b 12 c 13 Fifteen a 13 b 15 c 17 Six a b c Eight a b c Nineteen a 17 b 19 c 18 Three a b c Ten a 10 b 13 c 20 Seventeen a 16 b 19 c 17 Four a b c