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Question

Answer

Working backwards,

36/3 = 12

12 – 2 + 9 = 19

Ans : 19 marbles.

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Work backwards

Since 3 boys have equal no of marbles in the end, Total Unchanged 36 ÷ 3 = 12 marbles each in the end.

  A B C Total
In the End 12 12 12 36
  -6   +6  
  +2 -2    
    +9 -9  
At First 8 19 9 36 (checked)

Bobby had 19 marbles at first (Ans).

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