A 2 digit number is divided by the sum of digits then it gives square root of the number. Find the 2 digit number.

• Ans: 81
  Let the the two digit number be xy
  Given,
  Xy / (x+y) =square root of xy
  there are six ,2 digit whole square 16,25,36,49,64,81
  So if we take 81
  81/(8+1)=9
  Square root of 81 is also 9
  So the 2 digit number is 81
• 9 years agoHelpfull: Yes(55) No(1)
• let 2 digit number be xy;
  given:
  xy/x+y=sq. root(xy);
  81/(8+1)=root(81);
  81/9=9;
  9=9
  hence the 2 digit number is 81
• 8 years agoHelpfull: Yes(8) No(0)
• 81.
  81/(8+1)=9 its square root of 9.
• 9 years agoHelpfull: Yes(3) No(2)
• answer 81..
  ab/a+b=squre root
  2 digit squre number 16,25,36,49,81
  81/9 =81
• 8 years agoHelpfull: Yes(3) No(1)
• 81/9=9 which is the square root of 81
• 9 years agoHelpfull: Yes(2) No(2)
• 9^odd then unit digit =9
  9^even then unit digit =1
  By using this the answer is 2
• 9 years agoHelpfull: Yes(1) No(1)
• Ans:81
  81/(8+1)=81/9=9
  9 is a square root of 81
• 9 years agoHelpfull: Yes(1) No(0)
• The answer is 81
• 9 years agoHelpfull: Yes(1) No(0)
• 81
  
  8 + 1 = 9
  81/9 = square root of (81) = 9
• 9 years agoHelpfull: Yes(1) No(0)
• The number is 81
• 9 years agoHelpfull: Yes(1) No(1)
• Square root of a two digit must be a single digit . Assume that single digit as 9 . Square it . 81. 81/8+1 returns 9. So the answer is 81
• 7 years agoHelpfull: Yes(1) No(0)
• 81.
  8+1=9.->81/9=9 which is the square root of 81
• 9 years agoHelpfull: Yes(0) No(0)
• 81/(8+1) =9 :) GG -EZ :)
• 9 years agoHelpfull: Yes(0) No(2)
• Answer is 81.....Pls see the explanation above or below
• 8 years agoHelpfull: Yes(0) No(1)
• ans is 81
  81/8+1=81/9=9
  9 is the square root of 81
• 8 years agoHelpfull: Yes(0) No(0)
• Ans is 81
  81/(8+1)=9
  square root of 81 is 9
• 8 years agoHelpfull: Yes(0) No(0)
• Ans:81
  81/9=9==sqrt(81)
• 8 years agoHelpfull: Yes(0) No(0)
• Ans: 81 , 81=8+1=9
  So 81/9= 9 which is the square root of 81.
• 8 years agoHelpfull: Yes(0) No(0)
• The two digit number is 81. 81/9=9 which is the square root of the number.
• 8 years agoHelpfull: Yes(0) No(0)
• 81
  81/(8+1)=9=square root of 81
• 8 years agoHelpfull: Yes(0) No(0)
• 81
  81/9=9 which is the square root of that number
• 8 years agoHelpfull: Yes(0) No(0)
• the two digit number is 81.... 8+1 = 9 and square root of 9 is 81...
  
• 8 years agoHelpfull: Yes(0) No(0)
• 81
  8+1=9
  81/9=9
• 8 years agoHelpfull: Yes(0) No(0)
• The ans is 81.
  because,
  81/9=9.
  8+1=9,
  9 square is 81.
• 8 years agoHelpfull: Yes(0) No(0)
• 81/(8+1)=9
  81^1/2=9.
• 8 years agoHelpfull: Yes(0) No(0)
• 81 81/8+1=9 which is root of 81
• 7 years agoHelpfull: Yes(0) No(0)
• 12
  21
  1+2=3
  12/3
  21
  2+1=3
  21/3
• 7 years agoHelpfull: Yes(0) No(2)
• 81
  xy/x+y=sqrt(xy)
  
  =>x+y=sqrt(xy)
  
  =>8+1=sqrt(81)
  9=9
• 7 years agoHelpfull: Yes(0) No(0)
• Answer 81.
  8+1=9
  81/9=9
  9^2=81
  So ans 81
• 7 years agoHelpfull: Yes(0) No(0)
• sqrt(num)=num/sum of the digits
  num=(num/sum of the digits)^2
  num*(sum of the digits)^2=(num)^2
  (sum of the digits)^2=num
  Example:
  81=(8+1)^2
• 7 years agoHelpfull: Yes(0) No(0)
• let the 2 digit no. be xy
  given , xy/10x+y= square root of xy.
  now by hit and trial method let x=8 and y=1
  therfore 9= 9
  hence x=8 and y=1.
• 6 years agoHelpfull: Yes(0) No(0)
• they ask the 2digit number is square root.
  which means 16,25,36,49,64,- not but 81/9 and 9's square of 81
• 6 years agoHelpfull: Yes(0) No(0)
• 81 is the number
• 6 years agoHelpfull: Yes(0) No(0)
• 81/9 is 9
  9 is square root of 81
• 2 years agoHelpfull: Yes(0) No(0)