Is ~$x\geq 3$~ ?

(1) x² – 9 = 0
(2) x < 10

What is the remainder when the positive integer n is divided by the positive integer k, where k > 1 ?

(1) n = (k + 1)³
(2) k = 5

On the number line, what is the distance between the point 2x and the point 3x ?

(1) On the number line, the distance between the point -x and the point x is 16.
(2) On the number line, the distance between the point x and the point 3x is 16.

List S and list T each contain 5 positive integers, and for each list the average (arithmetic mean) of the integers in the list is 40. If the integers 30, 40, and 50 are in both lists, is the standard deviation of the integers in list S greater than the standard deviation of the integers in list T ?

(1) The integer 25 is in list S.
(2) The integer 45 is in list T.

If ~$\frac{x+y}{z}=-2$~, is x positive?

(1) z is negative.
(2) y is positive.

In a certain year the United Nations' total expenditures were $1.6 billion. Of this amount, 67.8 percent was paid by the 6 highest-contributing countries, and the balance was paid by the remaining 153 countries. Was Country X among the 6 highest-contributing countries?

(1) 56 percent of the total expenditures was paid by the 4 highest-contributing countries, each of which paid more than Country X.
(2) Country X paid 4.8 percent of the total expenditures.

If m and n are positive integers and mn = k, is m + n = k + 1 ?

(1) m = 1
(2) k is a prime number.

A state legislature had a total of 96 members. The members who did not vote on a certain bill consisted of 25 who were absent and 3 who abstained. How many of those voting voted for the bill?

(1) Exactly ~$\frac{1}{3}$~ of the total membership of the legislature voted against the bill.
(2) The number of Legislators who voted for the bill was 8 more than the total number who were absent or abstained.

If x and y are integers and x > 0, is y > 0 ?

(1) 7x - 2y > 0
(2) -y < x

Marta bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencils did Marta buy?

(1) Marta bought a total of 6 pencils.
(2) The total value of the pencils Marta bought was 130 cents.