math
posted by pat .
which choices correctly represent numbers in base seven.
(a)575 base seven
(b) 656 base seven
If one is incorrect write it so it is correct.

in a base number system, you could only use the numerals 01 2 3 4 5 6
so what do you think?
PS. If they "have to" teach you about different number systems, tell your teacher to stick to either base 2 or 8.
At least that would have some relevance
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