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Question

Answer

Work backwards.

In the end, they both have 240 marbles each.

A -> 240 

B -> 240

Ali gave 1/3 to Bala -> 240 = 2/3; 120 = 1/3

A -> 240 + 120 = 360

B -> 240 – 120 = 120

Bala gave 1/5 to Ali -> 120 = 4/5; 30 = 1/5

A -> 360 – 30 = 330

B -> 120 + 30 = 150

Ali gave 1/6 to Bala -> 330 = 5/6; 66 = 1/6

A -> 330 + 66 = 396

B -> 150 – 66 = 84

Ali had 396 at first.

 

 

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