Question

which least number should be added to 7991 to make it perfect square.​

Answer 1

Answer:

Step-by-step explanation:

√7991=89.39

Hence the very next number after 7991  which is

perfect square is 90^2

Hence , the least no. to be added to 7991 yo get a perfect  

square is 90^2-7991=109

Answer 2

Solution :-

Basic Method :-

Finding square root of 7991 we get,

8 ) 7991 ( 8

-64

15

169 ) 1591 ( 9

-1521

70

as we can see that,

→ 89² < 7991 < 90²

→ 7921 < 7991 < 8100

since the least added number is asked .

Therefore,

→ Required number = 8100 - 7991 = 109 (Ans.)

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