99^n is such a number begin with 8, least value of n?

Option: (a) 11 (b) 10 (c) 9 (d) n does not exist

• 11 will be ans.
  99^1=9801
  99^2=971299
  99^3=96157601
  like this......
  take only first two digit for n=1 99
  n=2 98
  n=3 97
  n=4 96
  ......................................................
  n=10 90
  n=11 89
  so for n=11 number start with 8
  
  
• 9 years agoHelpfull: Yes(31) No(1)
• 11 will be ans.
  Use the following to multiply...
  99(100-1)= 9900-99= 9801
  9801(100-1)= 980100-9801= 971299
  97129900-971299= 96157601
  .....
  .....
  On 11th we will get no starting with 8.
• 9 years agoHelpfull: Yes(15) No(0)
• Answer will be 11
  because 99^1=99
  99^1=99
  99^2=9801
  99^3=97.....
  99^4=96.......
  99^5=95......
  99^6=94.......
  99^7=93.........
  99^8=92....
  99^9=91.....
  99^10=90.......
  99^11=89..........
  at 99^11=89.......
  So answer is n=11
• 9 years agoHelpfull: Yes(5) No(0)
• Let suppose
  99^2 = 99(100-1) = 9900-99 = 9801
  9801(100-1) = 980100-9801 = 971299
  971299(100-1)= 97129900-971299 = 96157601
  .....
  .....
  In this if power is 2 then start with 98....
  if power is 3 then start with 97
  4 96
  5 95
  6 94
  7 93
  8 92
  9 91
  10 90
  now ,
  if the power is 11 then no. start with 89
  so 11 is the perfect answer
• 7 years agoHelpfull: Yes(1) No(0)
• d) n does not exist
  99^2= (100-1)^2
  999^2=(1000-1)^2
  .........
  When you expand the equation number always begin with 9.
• 9 years agoHelpfull: Yes(0) No(15)
• according to me option (d) will be correct because there is no value of n so that no. starts from 8
• 9 years agoHelpfull: Yes(0) No(2)
• 11 is the correct ans
• 9 years agoHelpfull: Yes(0) No(0)
• correct answer is 11
  bcz
  99^1=9
  99^2=1701
  99^3=96157601
  like this
  
  
  99^11=start with 8
• 8 years agoHelpfull: Yes(0) No(0)
• 11 is the perfect answer.
  11 will be ans.
  99^1=9801
  99^2=971299
  99^3=96157601
  like this......
  take only first two digit for n=1 99
  n=2 98
  n=3 97
  n=4 96
  ......................................................
  n=10 90
  n=11 89
  so for n=11 number start with 8
  
  using calculator 99^11=8.9533825e+21
• 6 years agoHelpfull: Yes(0) No(0)