I know a 5 digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

• let the sum of digits be x.
  To have 1 after the num it should be multiply with 10 and 1 should be added.
  To have 1 before it we should add 10^5 to it.
  on equating,we get 10x+1=3(x+10^5)
  on solving it we get x=42,857.
• 10 years agoHelpfull: Yes(1) No(0)