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    Mathematics for Elementary School Teachers
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    Exam 3: Understanding Addition and Subtraction
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    The GCF of Two Numbers Is 21
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The GCF of Two Numbers Is 21

Question 57

Question 57

Multiple Choice

The GCF of two numbers is 21 . Their LCM is 357 . What are the two numbers? ​


A) 21 and 357
B) 19 and 355
C) 42 and 355
D) 22 and 358
E) 42 and 714

Correct Answer:

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