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If r is a prime number greater than 2, ...

If r is a prime number greater than 2, and s is odd, what is rs?

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To solve the question "If r is a prime number greater than 2, and s is odd, what is rs?", we can follow these steps: ### Step 1: Understand the properties of prime numbers A prime number is defined as a number greater than 1 that has no positive divisors other than 1 and itself. The only even prime number is 2; all other prime numbers are odd. **Hint:** Remember that the only even prime number is 2, and all other primes are odd. ### Step 2: Identify the nature of r Since r is stated to be a prime number greater than 2, we can conclude that r must be an odd number. This is because all prime numbers greater than 2 are odd. **Hint:** Any prime number greater than 2 must be odd. ### Step 3: Identify the nature of s The problem states that s is an odd number. Therefore, we have two odd numbers: r (which is a prime greater than 2) and s. **Hint:** s is explicitly given as an odd number. ### Step 4: Multiply r and s Now we need to find the product rs. We know that the product of two odd numbers is always odd. This can be demonstrated with examples: - For instance, 3 (odd) multiplied by 5 (odd) equals 15 (odd). - Similarly, 7 (odd) multiplied by 9 (odd) equals 63 (odd). **Hint:** The multiplication of two odd numbers results in an odd number. ### Step 5: Conclusion Since both r and s are odd numbers, the product rs will also be an odd number. **Final Answer:** rs is an odd number.
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Knowledge Check

  • The smallest prime number greater than 48 is

    A
    49
    B
    50
    C
    51
    D
    53
  • Which one of the following equals the product of the smallest prime number greater than 21 and the largest prime number less than 16?

    A
    `13 cdot 16`
    B
    `13 cdot 29`
    C
    `13 cdot 23`
    D
    `15 cdot 23`
  • If r and s are two positive numbers and r is 25% greater than s, what is the value of the ratio r/s?

    A
    0.75
    B
    0.8
    C
    1
    D
    1.25
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