The citizens of planet nigiet are 4 fingered and have thus developed their decimal system in base 4. A certain street in nigiet contains 100 (in base 4) buildings numbered 1 to 100. How many 5s are used in numbering these buildings?
(a) 48 (b) 8 (c) 20 (d) 16

ans 0;
becoz there will be no 5 in base 4.
13 years agoHelpfull: Yes(7) No(2)
as we have 20 5s betwn 1-100 then we have to apply a frmula i.e,,2*4^1+2*4^0(due to base 4 i hv take ^4)=8
13 years agoHelpfull: Yes(3) No(1)
it is given as base 4 so the formuls is 2B.so 2 * 4=8.so 8 is tha ans.
similarly if its 1 to 1000 thn formula 3B^2
13 years agoHelpfull: Yes(2) No(7)
48 because 4*4+4*4+4*4=48
13 years agoHelpfull: Yes(2) No(5)
between 0-100 there are 20 no of 5's not only 5's any no frm 1-9 no is same always 4,so in dacimal it is 20,now in base 4 it will be 2*4^1+0*4*0=8 bt ans will be 0 as there is no 5 present in base 4 so 0 should be the right ans i thnk
13 years agoHelpfull: Yes(2) No(1)
ans is 8. for any base value the formula is 2*b for 1 to 100 & for 1 to 1000 formula is 3*b^2. where "b" is the base
13 years agoHelpfull: Yes(2) No(3)

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