▸Its square root is the whole number 12.
- A perfect square is the product of an integer with itself, so its square root has no decimal part.
- Perfect squares only end in 0, 1, 4, 5, 6, or 9, and their digital root is always 0, 1, 4, 7, or 9.
- Both +12 and -12 are valid square roots, but the principal (positive) root is 12.
Next stepTry the Range mode to list every perfect square in an interval, or Reverse mode to square any root you choose.