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Alphanumerics

In the following puzzles, each letter represents one of the decimal digits (1-9). The code changes from one puzzle to the next.

Trial and error will work on the first two, but it might be tedious in the Bonus. Try using some logical reasoning on all three, and tell us what you learn.

1. Switcheroo

2. Double Duty

Bonus: Reversal of Four-tune

Solutions

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