What is the value of 3n - 4 ?

(1) 6n – 10 = 30

(2) ~$\frac{n}{3}=\frac{20}{9}$~

Last Thursday, John assembled chairs at a rate of 3 chairs per hour for part of the day and Larry assembled no chairs. Last Friday, Larry assembled chairs at a rate of 4 chairs per hour for part of the day and John assembled no chairs. If John and Larry assembled chairs for a total of 7 hours during these two days, how many chairs did John assemble last Thursday?

(1) During these two days, John and Larry assembled a total of 25 chairs.
(2) During these two days, Larry assembled more chairs than John did.

If set S consists of the numbers 1, 5, -2, 8, and n, is 0 < n < 7 ?

(1) The median of the numbers in S is less than 5.
(2) The median of the numbers in S is greater than 1.

If c and d are integers, is c even?

(1) c(d + 1) is even.
(2) (c + 2)(d + 4) is even.

Some of the students enrolled at College T are part-time students and the rest are full-time students. By what percent did the number of full-time students enrolled at College T increase from the fall of 1999 to the fall of 2000 ?

(1) There were 50 more full-time students enrolled at College T in the fall of 2000 than in the fall of 1999.
(2) The total number of students enrolled at College T increased by 5 percent from the fall of 1999 to the fall of 2000.

Are the integers z and f to the right of 0 on the number line?

(1) The product of z and f is positive.
(2) The sum of z and f is positive.

If ax + b = 0, is x > 0 ?

(1) a + b > 0
(2) a - b > 0

What is the value of xy ?

(1) y = x + 1
(2) y = x² + 1

What is the value of xy ?

(1) y = x + 1
(2) y = x² + 1

Are positive integers p and q both greater than n ?

(1) p - q is greater than n .
(2) q > p