What is the greatest common factor (GCF) of 78 and 63?
Difficulty: Medium
About this MCQ
Medium SAT item. Correct choice: C. 3.
- A. 6
Why not A: “6” is not 3.
- B. 1638
Why not B: “1638” is not 3.
- C. 3 ✓
- D. 141
Why not D: “141” is not 3.
Correct answer
C. 3
Explanation
3 is the value that answers “What is the greatest common factor (GCF) of 78 and 63” (option C). Option A (6) is a different value from 3. Option B (1638) is a different value from 3. Option D (141) is a different value from 3. Keep 3 as the SAT fact for this stem.
Source: Original practice question, MCQsHub
Tags: SAT, American Exams, Quant, Number Properties
Submitted by: MCQsHub Editorial
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