Question

obtain the smallest digit no. of 4 digits and find which is perfect square .pls help​

Answer 1

Answer:

The smallest four-digit number is 1000; however that is not a perfect square, so we must examine the successors to 1000, such as 1001, 1002, 1003, … .

You should be able to find the answer by examining no more than two dozen numbers. However, 40% of the candidates may be eliminated because no perfect square can end with any of the digits { 2, 3, 7, 8 ).

None of 1001, 1004, 1005, 1006, 1009 are perfect squares.

Furthermore, the ten’s digit of a perfect square cannot be odd, unless the one's digit is 6; therefore (in the next decade) it is only necessary to test 1016 — which is not a perfect square.

2020 and 2021 do not qualify, either.

322=1024

The smallest four digit no. = 1000

32^2 is more than 1000 by 24;

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

Therefore, 1000+24 = 1024 is the smallest four digit number which is a perfect square.

Hope u get it.

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Answer 2

Answer:

Step-by-step explanation:

The smallest 4 digit number is 1000 whose square root is 31.62

So the required smallest 4 digit number is 32^2 =1024

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