How many four-digit numbers exist, such that the average of the sum of the individual digits of these numbers is 1?

• 20 numbers
  
  4000
  1111
  
  3010
  3100
  3001
  1300
  1030
  1003
  
  2200
  2020
  2002
  
  2110
  2101
  2011
  
  1120
  1102
  1210
  1201
  1012
  1021
• 13 years agoHelpfull: Yes(4) No(0)
• Do u mean that sum of all 4 digits is 4 like 1111, 2020,1210...?
  
• 13 years agoHelpfull: Yes(0) No(1)
• @dipin yes
• 13 years agoHelpfull: Yes(0) No(0)