Math Challenge suggestion for May - the mysterious number !!!! RRS feed

  • General discussion

  • to see the source of this problem and  the solution:

    it's an old book of mathematic that i've found on Gutenberg Project., page-17

    A Scrap-Book of Elementary Mathematics: Notes, Recreations, Essays by White

    A person privately fixing on any number, to tell him that number.
    After the person has fixed on a number, bid him double it and add 4 to that sum,
    then multiply the whole by 5; to the product let him add 12, and multiply the amount by 10.
     From the sum of the whole let him deduct 320, and tell you the remainder, 

    Now create a program to find the mysterious number ?

    and the general math formula behind it !

    Here is the book where i found this:

    • Changed type litdev Wednesday, April 20, 2016 5:33 PM
    • Edited by YLedEditor Sunday, May 1, 2016 2:28 PM to put a link for the book source
    Wednesday, April 20, 2016 1:16 AM