Q2: A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter or a pair of distinct letters written in alphabetic order. What is the least number of letters that can be used if there are 12 participants, and each participant is to receive a different code?
A. 4 B. 5 C. 6 D. 7 E. 8 Answer: b
The graph above shows the combined revenue, in billions of dollars, of a chain of food stores for each year over a four-year period. In 1994 a certain store’s revenue accounted for 2.0 percent of the combined revenue for that year, and in 1995 the same store accounted for 2.3 percent of the combined revenue for that year. What was the approximate percent increase in revenue for this store from 1994 to 1995 ?
A. 0.3% B. 15.0% C. 25.0% D. 30.4% E. 43.8% Answer: eQ17: What is the greatest prime factor of 2100 - 296 ?
A. 2 B. 3 C. 5 D. 7 E. 11 Answer:c 这一题的最大质因数不应该是31吗?可是没有这个选项。
谢谢大家了 Q17: What is the greatest prime factor of 2100 - 296 ?
A. 2 B. 3 C. 5 D. 7 E. 11 Answer:c 这一题的最大质因数不应该是31吗?可是没有这个选项。
谢谢大家了 |