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Best answer
1 1 vote
$ 441 + 43 = 484 $

$ 484 + 45 = 529 $

$ 529 + 47 = 576 $

$ \mathbf{576 + 49 = 625} $
• selected by
1 1 vote
$21 \times 21=441$

$22 \times 22=484$

$23 \times 23=579$

$24 \times 24=576$

$25 \times 25=625$
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