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The prime numbers are numbers greater than 1 that have no divisors other than 1 and themselves. Out of the numbers 21, 23, 22, and 27, only 23 is a Prime number because it is only divisible by 1 and 23 itself. The other numbers have divisors other than 1 and themselves, making them composite numbers.
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Earn +20 ptsQ: Which one is prime out of 21 23 22 27?
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