In the rectangular coordinate system above, the area of triangular region PQR is (A) 12.5 (B) 14 (C) 10√2 (D) 16 (E) 25 For GMAT geometry questions be active with diagrams. Don’t be satisfied with what you’re given. Try to make simple additions that provide more information (inferences). In general when trying to find […]
According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make an orange juice. How many 12 ounce cans of concentrate are required to prepare 200 6-ounce servings of orange juice? (A) 25 (B) 34 (C) 50 (D) 67
If two of the four expressions x+y, x+5y, x-y, and 5x-y are chosen at random, what is the probability that their product will be of the form of x² – by², where b is an integer? (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5 (E) 1/6 Be super comfortable with difference of squares. You’re almost
Which of the following lists the number of points at which a circle can intersect a triangle? (A) 2 and 6 only (B) 2, 4 and 6 only (C) 1, 2, 3 and 6 only (D) 1, 2, 3, 4 and 6 only (E) 1, 2, 3, 4, 5 and 6 only I’m often asked:
A committee of 3 people is to be chosen from four married couples. What is the number of different committees that can be chosen if two people who are married to each other cannot both serve on the committee? A. 16 B. 24 C. 26 D. 30 E. 32 GMAT combinatorics questions get demonized but
