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You can elimate the even numbers 72 and 42 right away because the only even Prime number is 2. Using the divisibility rules, you can eliminate 87; 8 + 7 = 15, which is divisible by 3, which means 87 is divisible by 3.

59 is the prime number.

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10y ago
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Q: Which of these numbers are prime number 72 87 42 59?
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