Multiple choice general knowledge history This is Babylonian clay tablet represent some numerical approximation. Which one? Square root of 2 cube root of 2 cube root of 4 Square root of 4 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Babylonian clay tablet YBC 7289 shows a geometric proof and approximation of the square root of 2, one of the earliest known representations of irrational numbers in mathematics.