Question

7. What is the least number of 4-digits which is a perfect square?​

Answer 1

Answer: 1024is the least number

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Answer 2

Answer:

1024

Step-by-step explanation:

31  

2

=961

32  

2

=1024

33  

3

=1089

34  

2

=1156

Least number of four digits = 1000.

(32)2 is more than 1000 by 24.

So, the least number to be added to 1000 is 24.

1000 + 24 = 1024

Therefore, the smallest four digit number which is a perfect square is 1024.

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