In which of the following base systems is 123 not a valid number?

A. Base 10

B. Base 16

C. Base 8

D. Base 3

## Show Answer

Answer: D

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In which of the following base systems is 123 not a valid number?

A. Base 10

B. Base 16

C. Base 8

D. Base 3

Answer: D

Share your understanding of this question with the correct explanation.