【正确答案】 A

【答案解析】Evaluate each column. Column A = 30 and Column B = -30. Column A is greater.

【正确答案】 B

【答案解析】The only primes whose sum is 12 are 5 and 7, both of which are less than 8. Note that 1 + 11 = 12, but 1 is not a prime [KEY FACT A27]. Column B is greater.

【正确答案】 A

【答案解析】In any triangle, if one side is longer than a second side, the angle opposite the longer side is greater than the angle opposite the shorter: side [KEY FACT J3], so c ＞ d. Column A is greater. (It is irrelevant that the third angle is 135°)

【正确答案】 A

【答案解析】It makes no difference how many students took the test nor how many were boys and how many were girls. More than half the boys and more than half the girls scored over 90, so more than half of all the grades were over 90. Column A is greater.
**Use TACTIC 2, Chapter 12. Assume 7 boys and 11 girls took the exam. Then 11 students (4 boys and 7 girls) got over 90 and the other 7 got 90 or less.