I came across this question in a random test and the correct answer was marked as "Binary Operation". I am pretty sure that to find the cube root of a number you only need that number alone and so I thought it is a "Unary Operation".
After searching around the web, I could see many sites mention this question and the answer as "Binary Operation" but no one has an explanation for that.
Can anyone help me understand why it is a Binary operation or are these websites wrong?