How do you work out a seventh of a number?

Answer 1

Start from the left end. Use the first digit only. If it is bigger than 7, then you can take 1 seven from it, so start your answer with "1" and take that seven away. That leaves you with a first number less than seven. Always, if the first number is less than seven then use the first two numbers instead. You now have the first number of your answer, and the what is left of your original number to deal with. Do exactly the same again, (if you can take 2 sevens, write 2 and take off 14, or 6 sevens write 6 and take off 42 etc) tagging the next stage answer to the right of your first stage answer. Keep going.