Question

give reason why the given number are not perfect square 12000​

Answer 1

Answer:

So now we know the digital root of 12,000 is 3. Is 3 in the list of digital roots that are always a square root (1, 4, 7 or 9)? Answer: NO, 3 is not in the list of digital roots that are always perfect squares. We can conclude that 12,000 IS NOT a perfect square and we don't need to factor!