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Fill MSFlexGrid with Numbers and Create Mathematical Trick

, 15 Sep 2008
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Create Mathematical Trick by displaying seven numerical tables using MSFlexGrid


I am using seven numerical tables to create this Mathematical Trick. I found the idea of this trick in my old papers but I don't remember from which book or magazine I read it before. I confess that my work is a translation of this idea to a VB6 program.


  • Choose number from 1 to 100, keep it in your mind.
  • I shall display (7) tables.
  • Every table contains some numbers.
  • Search for the number of your choice in every table.
  • If you find it: Click (Yes) button.
  • If not: Click (No) button.
  • After displaying last table (number 7):
  • I shall tell you your choice number!

Using the Code

The following code is an example to fill MSFlexGrid with numbers:

Dim c As Integer
Dim r As Integer
Dim n As Integer
Dim T As Integer

   With NumGrid
      T = 1
      For r = 0 To 4
         For c = 0 To 9
            .TextMatrix(r, c) = Str(T)
            T = T + 2
         Next c
      Next r

Please refer to the source code (Sub FillTab) to see how I fill the grid with numbers seven times.


You can find the source code when you extract the file and you can find the *.exe when you extract the file

Last Words

I hope that you enjoy this trick. If anybody knows the exposition of this trick, please let us know.

Contact Details


  • 9th September, 2008: Initial post
  • 15th September, 2008: Source and demo updated


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

No Biography provided

Comments and Discussions

GeneralI shall search again.. PinmemberMostafa Kaisoun12-Sep-08 8:31 
GeneralPart of solution.. PinmemberMostafa Kaisoun12-Sep-08 8:24 
Generalabout the trick PinmemberLotharLanger11-Sep-08 6:33 
GeneralI know, but how?! PinmemberMostafa Kaisoun10-Sep-08 7:13 
GeneralRe: I know, but how?! PinmemberRafael Oliveira10-Sep-08 11:43 

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