The year 2025 is a “perfect square year” because it’s the product of a number multiplied by itself – 45×45=2025, a phenomenon that hasn’t happened for decades.

(NEXSTAR) – Regardless of how 2025 turns out, it’s no ordinary year. The year 2025 is a “perfect square year” because it’s the product of a number multiplied by itself – 45×45=2025, a phenomenon that ...

To check if a number is a perfect square, one way to proceed is to keep adding its digits until you reach a single digit.