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Question


How many 4-digit positive integral numbers are there in base 7, if you are counting the numbers in the same base system?


Options:
A .   2058
B .   5666
C .   6000
D .   None of these
Answer: Option A
:
A

No. of 4-digit numbers in base 7 = 6×7×7×7 = 2058.



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