The number of the pencil is based on the type of carbon lead used inside. The thicker the carbon lead gets the higher the number of the pencil becomes.
If you notice a mechanical pencil is 0.9mm in diameter so it would be called a #0.9 pencil. A #2 pencil's lead is 2mm in diameter. So Why would we call a pencil a #3 pencil? Because it's lead is 3mm in diameter.
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The numbers indicate the relative hardness of the pencil lead.
No it is not. One of the two numbers must be 1. So 1.33... per pencil or 0.75 pencils for 1 would be unit rates.
A gross of pencils is 144 pencils.
288 pencils/36 boxes = 8 pencils per box.288 pencils/36 boxes = 8 pencils per box.288 pencils/36 boxes = 8 pencils per box.288 pencils/36 boxes = 8 pencils per box.
12 of them