Multiple choice general knowledge

Which is the number which multiplied by itself and then again devided by itself, does not give and answer as itself?

  1. -1

  2. -4

  3. 0

  4. 0.0000001

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For zero, when you multiply 0 × 0 you get 0, but then 0 ÷ 0 is undefined (division by zero is not allowed). For any other number n, the operation n × n ÷ n = n holds true.