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Which is a counterexample to this conjecture? The sum of any two consecutive integers is a composite number. A. 16 + 17 = 33 B. 10 + 11 = 21 C. 6 + 7 = 13 D. 7 + 8 = 15
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Dec 16, 2016
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Which is a counterexample to this conjecture?
The sum of any two consecutive integers is a composite number.
A.
16 + 17 = 33
B.
10 + 11 = 21
C.
6 + 7 = 13
D.
7 + 8 = 15
Mathematics
middle-school
Glorie
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C. 6 + 7 = 13
because 6 and 7 are consecutive integers, but 13 is not a composite number.
Biruk Abebe
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Dec 17, 2016
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Biruk Abebe
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The answer is C.
33,21,and 15 are all composite numbers. Meaning that they had factors other than 1 and themselves. 13 is a prime number because 13 only factors are 1 and itself.
Priyashree Bhadra
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Dec 21, 2016
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Priyashree Bhadra
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