I can read your mind.Cant believe?Just make a try :)
Instructions:
Select any two digit number , add both digit together and substract the total from the orignal number. Example - if you select number 55 then 5+5=10, then 55-10=45. So your final number is 45. Keep remember your final number. Now see in the chart , your final number has a relevant symbol. Keep rember this symbol, now click the button it will show the sysmbol which you are thinking of..