Sorry but you both are wrong answer is Similar to Sudoku, this puzzle created by Puzzles9 consists of a rectangle with nine squares, each containing a number, except for the bottom-right square.
Read the first two rows of numbers horizontally, each as one number — 289 and 324.
The pattern is that 17 x 17 = 289 and 18 x 18 = 324. So it stands to reason that the bottom row will be 19 x 19 = 361. Therefore, the missing number is one.
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