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James McPherson

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509. Tóthné Kovács Judit 3
510. Mohammad Loghmani 3
511. James McPherson 3
512. Puneet Garg 3
513. StarbuckyTX 3
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The aim is to place the some numbers from the list (1, 2, 4, 15, 16, 18, 28, 29, 31, 67, 72, 91) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B*C.
If 6acab - ac10b = b84a0 find number abc. Multiple solutions may exist.
What is the missing number?
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