A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...and the resulting number consist of only one digit.
Can you identify the number ?

• 0
  Only one that works is zero (0). That will give a single digit no matter what it multiplies with, multiple of 9 or not.
• 10 years agoHelpfull: Yes(2) No(0)