Q. The sum of the digits of two digit number is 12..if new number formed by reversing the digits is greater than the original number by 54.what will be the original number?

• let the old no.=10x+y.
  x+y=12
  new no.=10y+x.
  10y+x=10x+y+54.
  y-x=6
  x=3,y=9
  old no.=39
• 11 years agoHelpfull: Yes(3) No(2)
• the sum of digits of a two digit number =12
  x+y=12
  possibilities of x,y are=(6,6),(5,7),(4,8),(3,9)
  93-39=54
  x and y are 3 and 9
• 11 years agoHelpfull: Yes(2) No(1)
• Original number is 39.
  
  Number formed by reversing the digits = 93.
  
  93 - 39 = 54 => new number is greater than the original number by 54.
• 11 years agoHelpfull: Yes(1) No(1)