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How can you express (15 + 30) as a multiple of a sum of whole numbers with no common factor? a)2 × (7.5 + 15) b)3 × (5 + 10) c)5 × (3 + 6) d)15 × (1 + 2)
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How can you express (15 + 30) as a multiple of a sum of whole numbers with no common factor?

a)2 × (7.5 + 15)
b)3 × (5 + 10)
c)5 × (3 + 6)
d)15 × (1 + 2)

User Billy
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1 Answer

5 votes
a) has a non-whole number so cannot be the answer
b) and c) have common factors (5 and 3 respectively)
d) is correct since 1 and 2 have no common factors.
User Horkrine
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