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Mathematics, 19.01.2021 02:20 strawberrymochi1078

The sequence 12, 15, 18, 21, 51, 81, ... consists of all positive multiples of 3 that contain at least one digit that is a 1. What is the 50th term of the sequence? (2006 National Target #5)

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The sequence 12, 15, 18, 21, 51, 81, ... consists of all positive multiples of 3 that contain at lea...
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