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# Find the least number of four digits which is a perfect square.

To do:

We have to find the least number of four digits which is a perfect square.

Solution:

The lowest four digit number is 1000.

Square root of 1000 is,

31 | |

3 | 1000 9 |

61 | 100 61 |

39 |

$31^2<1000$

$32^2=1024$

Therefore,

The least number of four digits which is a perfect square is 1024.

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