What is the least common multiple (LCM) of 20 and 9?
Difficulty: Medium
About this MCQ
Medium GRE item. Correct choice: C. 180.
- A. 200
Why not A: “200” is not 180.
- B. 1
Why not B: “1” is not 180.
- C. 180 ✓
- D. 171
Why not D: “171” is not 180.
Correct answer
C. 180
Explanation
180 is the value that answers “What is the least common multiple (LCM) of 20 and 9” (option C). Option A (200) is a different value from 180. Option B (1) is a different value from 180. Option D (171) is a different value from 180. Keep 180 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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