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Question: List the factor(s) that 8 and 10 have in common.


A ) 2, 4
B ) 4
C ) 2
D ) 80

Steps to derive

1 To list the factors of 8, draw rectangular arrays that have a total of 8 squares.


2 From the figure, 1 × 8 = 8 and 2 × 4 = 8.

3 So, the factors of 8 are 1, 2, 4, and 8.

4 To list the factors of 10, draw rectangular arrays that have a total of 10 squares.


5 From the figure, 1 × 10 = 10 and 2 × 5 = 10.

6 So, the factors of 10 are 1, 2, 5, 10.

7 So, the factor that 8 and 10 have in common is 2.



Hence the right answer is Option C

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