GMAT Math 3 for 2.5 times its cost, how many bars did John and Peter have to sell to recoup their initial investment. A. 40 B. 60 C. 80 D. 100 E. 120 C. 80 Note: The equation to use is Total Sales = Quant.*Price THIS IS NOT A PROFIT EQUATION 1st: Each can

D. x/10 loss E. 2x/5 loss D. x/10 loss To solve: Profit = Revenue - Cost A population of 10 ants grew by a certain factor x each day. What is the value of x? 1. Had the factor been halved, the ants would have grown to a population of 320 in 5 days. 2. The average population growth for the first 5 days was 2,046 ants per day. D. Each statement alone is sufficient A certain store sells milk for x dollars per gallon. If the store purchases the milk for y dollars per gallon, how much per gallon does the store profit from the milk that it sells? 1) The store marks up ever gallon of milk that it sells by 50 percent. 2) x + y = 12 C. Both statements together Carl is a collector of old quarters and nickels. If Carl were to add 12 quarters to his collection, he would have 3 times as many quarters as nickels. Does Carl currently have more quarters than nickels? 1) Carl has more than 6 nickels 2) Carl has fewer than 8 nickels. A. Statement one is sufficient Make sure to do a thorough stem analysis. It never occurred to me to plug the equation into the inequality. Stem analysis Is Q>N Q+12 = 3n Q = 3n - 12 3n - 12 > N 2n > 12 n > 6 Is N > 6? Statement 1 n>6 YES Statement 2 N < 8 N.S. A car dealership had p cars in stock on Monday morning. By Monday at noon, the dealership had sold 1/z of its cars in stock, and by Monday at 5PM the dealership had sold 1/y of the remaining cars. If the dealership sold no other cars on Monday, which of the following properly expresses the number of cars that the dealership has in stock at the end of the day on Monday. Answer: p(yz-y-z+1)/zy To solve (pz-p)/z - [(pz-p)/z]* (1/y) Note; You have to start with p - (1/z)*p Molly purchased $5,000 worth of a short-term municipal bond that matures in one year. The bond pays an annual interest of 10 percent compounded semi-annually. A