SAT Math Multiple Choice Practice Question 281: Answer and Explanation
17. If , which of the following must be true?
A. I only
B. II only
C. I and II only
D. I and III only
E. I, II, and III
Correct Answer: C
C Think of numbers that are larger than their squares. This excludes negatives, because the squares of negatives are always positive. It also excludes numbers greater than 1, because the squares of these are bigger than the original numbers. Therefore, . This means I and II are true, but not III.