Question

If the number 2 pencil is the most popular, why is it number 2?​

Answer 1

Answer:

A pencil’s location on the HB graphite grading scale depends on the hardness of its graphite core. The hardness of the graphite core is often marked on the pencil — look for a number (such as “2” “2-1/2” or “3”) — and the higher the number, the harder the writing core and the lighter the mark left on the paper.

Explanation:

Answer 2

Pencils numbered higher than 2 have harder leads and are often used by engineers, architects, and draftsmen because of their harder points.