“The Empty Set” in math

There is a particular ACT math question that always raises students’ eyebrows because of an unusual answer choice that they can’t decipher. The question goes: Which of the following is the set of all real numbers x such that x+3 > x+5? (F)The empty set (G)The set containing all real numbers (H)The set containing all…

Read More

“Assumption” questions in reading comp.

There’s a strange type of question that has popped up a couple of times on the new SAT exams.  A couple of questions on science passages in the reading comp section have asked about an “assumption” made by the authors/researchers in the passage. Even some of my strongest students tend to struggle with these questions,…

Read More