What do the smaller lines on the inch side of the ruler represent

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What do the smaller lines on the inch side of the ruler represent? - Quora

Where is 6.7 on a ruler? - Quora

If I break a ruler and use the sharp part of it, can it bleed? - Quora

If I break a ruler and use the sharp part of it, can it bleed? - Quora

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What does a millimeter ruler look like? - Quora

How to Read a Ruler in Inches and Centimeters