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Which number is the odd one out? 11, 13, 15, 17 (2022)

Practice Questions

Q1
Which number is the odd one out? 11, 13, 15, 17 (2022)
  1. 11
  2. 13
  3. 15
  4. 17

Questions & Step-by-Step Solutions

Which number is the odd one out? 11, 13, 15, 17 (2022)
  • Step 1: Look at the numbers given: 11, 13, 15, 17.
  • Step 2: Understand what a prime number is. A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.
  • Step 3: Check each number to see if it is prime.
  • Step 4: 11 is prime because it can only be divided by 1 and 11.
  • Step 5: 13 is prime because it can only be divided by 1 and 13.
  • Step 6: 15 is not prime because it can be divided by 1, 3, 5, and 15.
  • Step 7: 17 is prime because it can only be divided by 1 and 17.
  • Step 8: Since 15 is not a prime number, it is the odd one out.
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