Mathematics, 17.08.2020 14:01 limelight11

L8 When visiting Planet Xenon We noticed that the national inhabitants had a system of numeration identical in structure to ours except that they used only the digits 0, 1, 2, 3, 4, 5, 6 and 7.
a. How many fingers did they have on each hand?
b. How could they represent our 100 in their system?

please answer and show your thinking

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