{"id":"gre-free","timeLimitSec":450,"questions":[{"id":"grf-01","section":"verbal","q":"Because the evidence against the defendant was largely _____, the jury had to infer his presence at the scene from a chain of indirect clues.Which choice best completes the text?","options":["inadmissible","incontrovertible","circumstantial","fabricated"],"answer":2,"explain":"Evidence that only lets you infer a fact from indirect clues is circumstantial. Incontrovertible (beyond dispute) evidence would need no chain of inference."},{"id":"grf-02","section":"verbal","q":"The board's decision seemed _____ to employees, who could see no reason at all for closing the company's most profitable branch.Which two words both complete the sentence and give it the same meaning?","options":["prudent and sensible","baffling and inexplicable","baffling and generous","reasonable and well-founded"],"answer":1,"explain":"Employees saw no reason for the decision, so it seemed baffling or inexplicable; both words give the sentence the same meaning. Reasonable/well-founded and prudent/sensible are synonym pairs with the opposite meaning."},{"id":"grf-03","section":"verbal","q":"Coffee was once blamed for heart disease, mainly because early studies found more heart problems among coffee drinkers. Those studies did not account for smoking, which at the time was far more common among heavy coffee drinkers. When later research adjusted for smoking, most of the link disappeared.The passage suggests that the early studies were flawed because they","options":["did not separate the effects of coffee and smoking","measured heart disease incorrectly","studied far too few coffee drinkers to give reliable results","included only people who smoked"],"answer":0,"explain":"Smoking was a hidden third factor linked to both coffee and heart disease. Once researchers adjusted for it, most of the link disappeared."},{"id":"grf-04","section":"quant","q":"n is a positive integer.
Quantity A: n2
Quantity B: 2nCompare Quantity A and Quantity B.","options":["Quantity A is greater","Quantity B is greater","The two quantities are equal","The relationship cannot be determined from the information given"],"answer":3,"explain":"If n = 1, A = 1 and B = 2 (B greater); if n = 2, both are 4; if n = 3, A = 9 and B = 6 (A greater). Different values give different results, so the relationship cannot be determined."},{"id":"grf-05","section":"quant","q":"The price of an item rises by 50% and then falls by 50%. The final price is what percent of the original price?","options":["75%","125%","50%","100%"],"answer":0,"explain":"Take an original price of 100: after +50% it is 150, and 50% off 150 leaves 75. Percent changes apply to different bases, so they do not cancel."}]}