This is the most difficult times table you will learn, number 12. Practice it as much as you can and learn it by heart. Here’s a little mnemonic to help you: First multiply the number by 10 and then by 2 and add the two results. For example: 5 x 12 (5 x 10 = 50 and 5 x 2 is 10, then add 50 + 10 = 60).