Sub 505 (Easy)
What is the value of a - b ?
(1) a = b + 4
(2) (a - b)^2 = 16
505-555 (Easy)
If rs â 0, is 1/r + 1/s = 4 ?
(1) r + s = 4rs
(2) r = s
505-555 (Easy)
If r and s are nonzero integers, is r/s an integer ?
(1) r - 1 = (s + 1)(s - 1)
(2) r - s = 20
Sub 505 (Easy)
In the equation x^2 + bx + 12 = 0, x is a variable and b is a constant. What is the value of b ?
(1) x - 3 is a factor of x^2 + bx + 12.
(2) 4 is a root of the equation x^2 + bx + 12 = 0.
505-555 (Easy)
If x is a positive integer, is x â x an integer?
(1) 4 x â â â 4 x is an integer.
(2) 3 x â â â 3 x is not an integer.
605-655 (Medium)
If x and y are nonzero integers, is x^y < y^x ?
(1) x = y^2
(2) y > 2
655-705 (Hard)
If x is a positive number less than 10, is z greater than the average (arithmetic mean) of x and 10?
(1) On the number line, z is closer to 10 than it is to x.
(2) z = 5x
555-605 (Medium)
Is x m * ( m 2 + n 2 + k 2 ) = x m + y n + z k x m * ( m 2 + n 2 + k 2 ) = x m + y n + z k ?
(1) z k = x m z k = x m
(2) x m = y n x m = y n
505-555 (Easy)
What is the average (arithmetic mean) of a, b, and c ?
(1) a + 2b + 3c = 10
(2) 3a + 2b + c = 14
Sub 505 (Easy)
If 2 x ( 5 n ) = t 2 x ( 5 n ) = t , what is the value of t?
(1) x = n + 3 x = n + 3
(2) 2 x = 32 2 x = 32