What does the number on the pencil mean?
The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a number 2. Harder lead makes a lighter mark and softer lead makes a darker mark.
How long does a pencil last?
It’s been estimated that the average pencil has enough graphite to write about 45,000 words!
What if you made a mistake before they invented erasers?
Before using rubber for erasing, people used to use bread!