Our identifying prime and composite numbers worksheets are a must-try! Kids work through 18 numbers, distinguishing between prime and composite. A prime number is divisible only by 1 and itself, while a composite number has more than two divisors. For instance, 7 is prime because it can be evenly divided by 1 and 7, whereas 12 is composite as it can be divided by 1, 2, 3, 4, 6, and 12.
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