There are 2 trees in a garden (tree "A" and "B") and on the both trees are some birds.

The birds of tree A say to the birds of tree B that if one of you come to our tree, then our population will be the double of yours.

Then the birds of tree B tell to the birds of tree A that if one of you come here, then our population will be equal to that of yours.

Q. How many birds in each tree?

• 7 birds in tree A. 5 birds in tree B.
• 14 years agoHelpfull: Yes(4) No(2)
• Let the birds on Tree A = x
  Birds on Tree B = y
  According to question :
  When 1 bird fly from tree B to tree A
  Trees of A = x + 1
  Trees on B = y - 1
  x + 1 = y - 1
  => y-x = 2........(i)
  
  When 1 bird fly from tree a to tree b
  Birds on Tree A = x - 1
  Birds on Tree B = y +1
  y + 1 = 2 ( x - 1 )
  2x-y = 3............(ii)
  From equation (i) and (ii), we get
  x= 5 and y = 7.
• 11 years agoHelpfull: Yes(3) No(2)
• Tree A have 7 birds and Tree B have 5 birds
• 12 years agoHelpfull: Yes(2) No(1)
• 5 and 7
• 14 years agoHelpfull: Yes(1) No(3)
• One say (A) tree has 7 birds and another tree Say (B) has 5 birds
  A- 1= 6 A6B
  B+1 = 8A 4B
• 14 years agoHelpfull: Yes(0) No(4)
• Tree A have 7 birds and Tree B have 5 birds
• 12 years agoHelpfull: Yes(0) No(2)
• Tree A have 7 birds and Tree B have 5 birds
• 12 years agoHelpfull: Yes(0) No(2)
• on tree A = 7 birds
  and on tree B= 5 birds
• 8 years agoHelpfull: Yes(0) No(2)
• it can be possible as in 3 and 3
• 6 years agoHelpfull: Yes(0) No(1)