+

the + symbol and the x symbol are assigned to the same symbol group. both are old ideograms appearing in most cultures. both can mean the number 10 (X is ten in latin). i really like how symbols.com explains the different hobo signs: in the French hobo system [+] means here they give nothing & X means this apartment/house is a good project for a burglary. [+] vertical line = spirit; horizontal line = material. compare symbols for venus & mars.
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QUINCUNX
Category:Math