Easily confused symbols

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Some symbols are hard to distinguish, or are easily confused for each other, particularly when handwritten.

Handwritten examples

When 1 is written with a twiddle at the top rather than just as a straight line, it could look like a 7. Or, a hastily-written 7 could look like this kind of 1.

A common way of resolving this is to draw a line across the middle of the 7.

m, μ, u and n can all run into each other, particularly when written in cursive.

A famous example where these combine to produce something hard to read is the word 'minimum':

The word "minimum", handwritten.