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Question

The common factor of 10a2 + 5b2 + 15c2 is


A

3

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B

a

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C

5

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D

5b

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Solution

The correct option is C

5


10a2= 2 × 5 × a × a

5b2= 5 × b × b

15c2= 3 × 5 × c × c

The common factor is 5.


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