Question: The citizens of planet nigiet are 8 fingered and have thus developed their decimal system in base 8. A certain street in nigiet contains 1000 (in base 8) buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?

Options:
a)192
b)64
c)54
d)256

Solution.: 256
In base 8 digits 0-7 exist and 1000 can be represented as 1750 in base 8.
So it needs 256 no.of 3's to number from 0 to 1750 when calculated

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