In T. Nagar the building were numbered from 1 to 100.Then how many 1‟s will be present in the numbers?
Option
a) 18
b) 19
c) 20
d) 21

• 21
  1,10.11.12.13.14.15.16.17.18.19.21.31.41.51.61.71.81.91.100
• 10 years agoHelpfull: Yes(15) No(2)
• 1.10.11.12.13.14.15.16.17.18.19.21.31.41.51.61.71.81.91& 100
  ^^
  there is two "ones" in eleven.
  answer is 21.
• 10 years agoHelpfull: Yes(4) No(0)
• Ans - c) 20
  numbers- 1,10,11,12,13,14,15,16,17,18,19,21,
  31,41,51,61,71,81,91,100
  
• 10 years agoHelpfull: Yes(3) No(3)
• ans=21
  1-10=2
  11-20=10
  21-30=1
  31-100=8
• 10 years agoHelpfull: Yes(1) No(0)
• When asked such questions like hw many so n so will b present from 1-100 ;1-9 the ans will b 20 only..!
  xcept 0 , we get only 11 zeros from 1-100.
• 10 years agoHelpfull: Yes(1) No(1)
• 21
  1,10,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91,100
• 10 years agoHelpfull: Yes(0) No(0)
• 21
  1,10,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91,100
  
• 10 years agoHelpfull: Yes(0) No(0)
• 1 to 10 has 2 1's
  11 to 19 has 10 1's
  21,31,41,51,61,71,81,91,100=9 1's
  totally 2+10+9=21 ones
• 10 years agoHelpfull: Yes(0) No(0)
• 20-
  1,10,11-19,21,31,41,51,61,71,81,91,100
  
  
• 10 years agoHelpfull: Yes(0) No(0)
• 19
  count the no with 1
• 10 years agoHelpfull: Yes(0) No(0)
• 21 is the answer
• 10 years agoHelpfull: Yes(0) No(0)
• 21, as from 1,10,11 ....19,21,31,41,51,61,71,81,91,100 makes 21
• 10 years agoHelpfull: Yes(0) No(0)
• ans is 20
  bcoz from 1 to 100 there are total 20 nos that has 1 in it
  they are 1,10,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91,100
  and 11 is aloted to only one house so it is counted as only 1 one not as two one.hence ans=20.
• 10 years agoHelpfull: Yes(0) No(1)
• ans is 21
  from 1 to 100 there are total 20 nos that has 1 in it
  they are 1,10,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91,100
  and 11 is alloted to only one house but 11 has two 1's in it....so it should be taken into account hence ans=21
• 8 years agoHelpfull: Yes(0) No(0)