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Question: What do you mean by Duodecimal Numbers ?

Answer:

These are numbers in base twelve. They are expressed using groupings of units, twelves, (twelve)2 and so on. In addition to the digits 0,1,2, …..,9 two further symbols are required for ten and eleven, usually taken as T and E. Languages using duodecimal number systems are uncommon.

Then for example,
32Etwelve = (3 x 144ten) + (2 x 12ten) + 11ten = 467ten