If x is a positive integer, is x a prime number?
(A) x - p = q - x = k, where p, q, and k are prime numbers.
(B) The total odd factor of 15k3 is 4, where k is a prime number.
If list Q contains more than two numbers, are all the numbers in Q equal?
(1) The sum of all the numbers in Q is zero.
(2) The product of any two numbers in Q is zero.
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When x + y is integer, is y an integer?
(1) x is an integer.
(2) x + 2y is an integer.
The positive integer k has exactly two positive prime factors, 3 and 7. If k has a total of 6 positive factors, including 1 and k, what is the value of K?
(1) 32 is a factor of k
(2) 72 is NOT a factor of k
Two consecutive positive integers, each greater than 9, are divided by 5. What is the sum of the remainders?
(1) The sum of the remainders is even.
(2) The sum of the units digits of the two original integers is 9.
If positive integer y is equal to the sum of all the unique factors of the positive integer x, is |x-y| > 1?
(1) x is not prime.
(2) x does not equal 1.
What is the remainder when the positive integer n is divided by 6?
(1) The remainder is 3 when n is divided by 8
(2)The remainder is 8 when n-1 is divided by 9
Is integer x equal to 3?
(1) x has no prime multiples.
(2) x has no odd multiples.
If a and b are prime numbers, is ab even?
(1) The sum of a and b is prime
(2) The difference of a and b is prime