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A number that ends in an odd number of zeros (like 1000 or 50) can never be a perfect square.
Which of these is NOT a perfect square for this reason?

Class 8Properties of Square NumbersSquares and Roots
  • A8000
  • B1600
  • C8100
  • D490000

Step-by-Step Solution

A perfect square ends in an even number of zeros. 8000 has 3 (odd) trailing zeros, so it cannot be a perfect square. .
Answer: A) 8000

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