Let's analyze the given numbers:
5, 7, 12, 17, 19, 23

Step 1: Identify Patterns

• Most of the numbers (5, 7, 17, 19, 23) are prime numbers.
• However, 12 is not a prime number (it is divisible by 2, 3, 4, and 6).

Step 2: Conclusion

The odd one out is 12 because it is the only non-prime number in the set.

Would you like a different approach or more details?

Related Questions:

1. What are prime numbers and why are they important?
2. Can you find the odd one out in a different way, such as based on even/odd properties?
3. How can you determine whether a number is prime?
4. What are some common sequences that include prime numbers?
5. Can you generate the next three prime numbers after 23?

Tip:

To check if a number is prime, see if it has exactly two factors: 1 and itself. If it has more than two factors, it is not prime.