ANSWER

Step-by-step explanation
Given;

To use simple division method. You can start by dividing 6 by 5;

6 divided by 5 is 1, remainder 1. Now try to put the remainder on the next number which is 5. This will make it 15. Hence;

Now, the answer(quotient) is;

6 is greater than 5, and 6 can only be divisible by 5 once. Because it's not up to 12.