The sum of 18 +45 is a multiple of which sum?

1 answer:

6 0

Answer:

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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