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The number 2 × 3 × 5 × 7 + 1 is1. a prime number2. not a prime, but power of a prime3. not a power of a prime, but a composite even number4. not a power of a prime, but a composite odd number |
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Answer» Correct Answer - Option 1 : a prime number Prime number: A number which is divisible by either 1 or itself is called prime number. Composite number: A number which is divisible by number\s other than 1 or itself is called as composite number. Given number = 2 × 3 × 5 × 7 + 1 = 210 + 1 = 211 The number 211 is only divisible by 1 and itself, ∴ The given number is a prime number. |
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