Jack and Mark both received hourly wage increases of 6 percent. After the wage increases, Jack's hourly wage was how many dollars per hour more than Mark's?

(1) Before the wage increases, Jack's hourly wage was $5.00 per hour more than Mark's.
(2) Before the wage increases, the ratio of Jack's hourly wage to Mark's hourly wage was 4 to 3.

The positive integers x, y, and z are such that x is a factor of y and y is a factor of z. Is z even?

(1) x is even.
(2) y is even.

In a certain year, the difference between Mary's and Jim's annual salaries was twice the difference between Mary's and Kate's annual salaries. If Mary's annual salary was the highest of the 3 people, what was the average (arithmetic mean) annual salary of the 3 people that year?

(1) Jim's annual salary was $30,000 that year.
(2) Kate's annual salary was $40,000 that year.

If there are more than two numbers in a certain list, is each of the numbers in the list equal to 0 ?

(1) The product of any two numbers in the list is equal to 0.
(2) The sum of any two numbers in the list is equal to 0.

If x and y are positive integers, what is the value of xy ?

(1) The greatest common factor of x and y is 10.
(2) The least common multiple of x and y is 180.

If x and y are positive integers, is the product xy even?

(1) 5x - 4y is even.
(2) 6x + 7y is even.

The sum of the integers in list S is the same as the sum of the integers in list T. Does S contain more integers than T ?

(1) The average (arithmetic mean) of the integers in S is less than the average of the integers in T.
(2) The median of the integers in S is greater than the median of the integers in T.

If N is a positive integer, is the units digit of N equal to zero?

(1) 14 and 35 are factors of N.
(2) N = (2⁵)(3²)(5⁷)(7⁶)

If m, k, x, and y are positive numbers, is mx + ky > kx + my ?

(1) m > k
(2) x > y

Is |x - y| > |x| - |y| ?

(1) y < x
(2) xy < 0