If n is a real number, then 2n would
never be part of which number set?
(A) a real number (B) an irrational number
(C) a rational number (D) an imaginary number
(E) an integer
If 2n^2 is an even integer, what is true about n + 1?
(A) It is an even integer.
(B) It is an odd integer.
(C) It can be an odd or even integer.
(D) It is a prime number.
(E) It is a perfect square.