The following problem was given in the Eureka journal (October 1963/University of Cambridge). This problem can be solved by hand without computers. There is a unique solution. Have fun solving!
Fill in the asterisks with digits other than three to make a correct division. You can assume that all leading digits are non-zero.
*3* ------ *3*)3***3 *** --- *** *** --- **3 **3 --- O
I would like to acknowledge Beastly Gerbil’s help in formatting this long division.