What is the greatest common factor (GCF) of 18 and 20?
Difficulty: Medium
About this MCQ
Medium GRE item. Correct choice: B. 2.
- A. 180
Why not A: “180” is not 2.
- B. 2 ✓
- C. 38
Why not C: “38” is not 2.
- D. 4
Why not D: “4” is not 2.
Correct answer
B. 2
Explanation
2 is the value that answers “What is the greatest common factor (GCF) of 18 and 20” (option B). Option A (180) is a different value from 2. Option C (38) is a different value from 2. Option D (4) is a different value from 2. Keep 2 as the GRE fact for this stem.
Source: Original practice question, MCQsHub
Tags: American Exams, GRE, Quant, Number Properties
Submitted by: MCQsHub Editorial
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