There are 3 societies A,B,C having some tractors each.
A Gives B and C as many tractors as they already have.
After some days B gives A and C as many tractors as they have.
After some days C gives A and B as many tractors as they have.
Finally each has 24 tractors.what is the original No.of
tractors each had in the beginning?

• After round 3
  a b c
  24 24 24
  
  A and B both doubled in round 3, so slice them in half to get A and B and subtract from total 72 to get C. That means that the previous nubers must be...
  
  after round 2
  a b c
  12 12 48
  
  A and C both doubled in round 2, so the previous numbers were...
  
  after round 1
  a b c
  6 42 24
  
  Rinse and repeat with B and C
  
  originally
  a b c
  39 21 12(ans)
• 12 years agoHelpfull: Yes(6) No(1)
• 39,21,12 tractors with A,B and C respectively.
• 12 years agoHelpfull: Yes(1) No(1)
• A--B--C
  24-24-24
  12-12-48
  6-42-24
  39-21-12
  
• 12 years agoHelpfull: Yes(1) No(1)