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Which of these num. are prime: 1, 11, 21, 51?
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3 votes
Which of these num. are prime:
1, 11, 21, 51?

User Timing
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2 Answers

3 votes
A prime number is a number that can only be divided by 1 and itself evenly.

So, the answers are 1 and 11.
User Richard Harris
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7.6k points
3 votes
11 is a prime number


User Omittones
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7.4k points
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