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9 February, 19:51

The sum of 18 + 45 is a multiple of which sum? A. (3+9)

B. (2+5)

C. (1+3)

D. (9+9)

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  1. 9 February, 22:20
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    B. (2 + 5).

    Step-by-step explanation:

    18 + 45 = 63

    The prime factors of 63 = 3*3*7

    So 63 is a multiple of 7.

    The answer is (2 + 5) (=7).
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