Number Theory T...

If $$i^2$$ $$= -1$$, then find the odd one out of the following expressions.

Which of the following is a prime number?

What is the sum of the least prime number and the greatest negative even integer?

What is the sum of the smallest prime and the largest prime less than $$10$$?

For $$i=\sqrt{-1}$$, what is the sum $$\left(7+3i\right) + \left(-8+9i\right)$$?

Perform the indicated operations:
$$(8-2i)-(-2-6i)$$

What is the least positive integer that is the product of $$3$$ different prime numbers greater than $$2$$?

Which one of the following is not a prime number?

The complex number $$e^{i\theta }$$ can be expressed in vector form by

How many prime numbers are less than $$50$$?