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elixir/secret-handshake/HINTS.md

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+# Hints
+
+## General
+
+- Use `Bitwise` (or div/rem).
+- If you use `Bitwise`, an easy way to see if a particular bit is set is to compare
+the binary AND (`&&&`) of a set of bits with the particular bit pattern you
+want to check, and determine if the result is the same as the pattern you're
+checking.