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crackgmat007
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9 is odd ---> 9*3 = 27
6 is even ---> 6/2 = 3
27 *3 = 81.
Now 81 is not inside a box. The solutions are with a box around them.
27 is the only possible solution because 27--> odd so 27(3) = 81 which matches the solution for 9*6
