The citizens of planet Oz are 4 fingered and thus have developed a number system in base 4. A certain street in Oz contains 100 buildings numbered from 1 to 100. How many 1's are used in numbering these buildings? Express your answer in base 10.

• in system of base 4 means that houses will be numbered like:-
  001,002,003,010,011,012,013,020,021,022,023,030,031,032,033,100
  and no of 1s in this series is 021 or 9 in base 10.
• 13 years agoHelpfull: Yes(3) No(3)
• @admin can u please explain these type of ques in which
  they are asking about base 4 or base 8
  and in last sentence ques is express in base 10 or others
• 12 years agoHelpfull: Yes(0) No(0)