In the xy-plane, the origin O is the midpoint of line segment PQ. If the coordinates of P are (r,s), what are the coordinates of Q? A. (r,s) B. (s,–r) C. (–s,–r) D. (–r,s) E. (–r,–s) Correct Answer: E Full explanation coming soon. Send us a note if you’d like this added to the express
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
If a, b, c, and d are numbers on the number line shown and if the tick marks are equally spaced, what is the value of a+c? (1) a + b = -8 (2) a + d = 0 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2)
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For any positive integer x, the 2-height of x is defined to be the greatest nonnegative integer n such that 2^n is a factor of x. If k and m are positive integers, is the 2-height of k greater than the 2-height of m? (1) k > m (2) k/m is an even integer. A.
If k^2 = m^2, which of the following must be true? (A) k = m (B) k = −m (C) k = |m| (D) k = −|m| (E) |k| = |m| Correct Answer: E Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons of
If k^2 = m^2, which of the following must be true? Read the Full Article »