which of the following numbers is an imaginary number ?

Which of the following number is called Ramanujans number ?

Which one of the following numbers is a non-real number ?

Which of the following numbers is the cube of an odd number?

Which one of the following number is not a real number ?

Which of the following numbers are called magic numbers?

Which of the following numbers is the cube of an even number?

Which one of the following binary number is the prime number?

Which one of the following is the real part and imaginary part of the complex number: ((1+i)/(1-i))-((1-i)/(1-i)) ?