If we multiply the digits of a number until we get a single digit, then which is the only two digit number which require multiplication of digits more than 3 times?

• 77 is that number
  
  77 =7*7 =49
  49 =4*9 =36
  36 =3*6 =18
  18 =1*8 =8
• 12 years agoHelpfull: Yes(4) No(1)
• no=77
  7*7=49
  4*9=36
  3*6=18
  1*8=8
• 12 years agoHelpfull: Yes(2) No(0)