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Answer :

Answer:

25

Step-by-step explanation:

1 )13431 (11

  1

 -

-------------

21)34

   21

  -

_____

226)1331

        1356

      -

   ________

           -25

so if we add 25 it becomes a perfect square.

13431+25=13456

check

16|13456

29 |841

     | 29

13456=4×4×29×29

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