What is the largest prime factor of 12

The largest prime factor of 12 is 3.

Start from the smallest prime number and make your way up until you can't anymore.

Example:

Start with 2, which is the smallest prime number.

12 : 2 = 6.

It's evenly divided by 2 but 6 is NOT a prime number, so you need to keep going.

6 : 2 = 3.

3 IS a prime number, and that is your answer.

12 = 2 * 2 * 3.

The largest prime factor of 12 is 3