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play699
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Comment if i should do band 4
1 = 1 2 = 2 3 = 10 4 = 11 5 = 20 6 = 100 7 = 101 8 = 102 9 = 110 10 = 111 11 = 200 12 = 201 13 = 202 14 = 1000 15 = ?
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Yes do ir
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