Seudónimo
Seudónimo
13-01-2016
Mathematics
contestada
Which number is not composite 2,9,15,21
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Аноним
Аноним
13-01-2016
A composite number is divisible by other numbers, including 1 and itself.
Opposite of composite is prime, so we need to look for the PRIME number.
2 is a prime number because it is only divisible by 1 and itself(2).
Answer: 2
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texily55
texily55
13-01-2016
2 is the only number that is prime. The others are composite because they have factors other than 1 and itself.
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