How many 9's are there in 99999989999^2 ?

• 9
  bcz 989^2 contains 1 nine
  99899^2 contains 3 nine
  .
  .
  .
  so 99999989999^2 contains 9 nine
• 9 years agoHelpfull: Yes(8) No(2)
• 11
  there is already 10 nine and thr is square so total nine is 10+1=11
• 9 years agoHelpfull: Yes(5) No(23)
• 9^2 contains 0 nine
  99^2 contains 1 nine
  999^2 contains 2 nine
  9999^2 contains 3 nine
  .
  .
  Similarly 9999999999^2 contains 9 nine
• 9 years agoHelpfull: Yes(4) No(4)
• 9 numbers of 9's are there.
• 9 years agoHelpfull: Yes(3) No(3)
• i think....answer is 6
  
  989*989=978121=1 nine
  9989*9989=99780121=2 nines
  .
  .
  .
  99999989999^2=6 nines
• 8 years agoHelpfull: Yes(2) No(0)
• 10 numbers of 9's are there
• 9 years agoHelpfull: Yes(0) No(4)
• Guys question is :
  How many 9's are there in 9999999999^2 ?
• 9 years agoHelpfull: Yes(0) No(4)
• (10000000000-1)^2=put formula of (A-B)^2=A^2-2AB+B^2 and see the value
  
• 9 years agoHelpfull: Yes(0) No(1)
• And is 9...since the number is in the evening form 10^11-10001.it's square is 10^11(10^11-20002)+100020001.so 10^11-20002=99999979998=so 9 nines.....
• 9 years agoHelpfull: Yes(0) No(2)