Unix
The octal representation 652 indicates

Write permission for others
None of these
All of these
Execute permission for the owner
Read and write permission of groups

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Unix
The % key allows you

to move the cursor to a matching delimiter, when a delimiters a parenthesis, a bracket, or a brace.
to move the cursor to the first column in the current line
to move the cursor backward to the beginning of a word
to move the cursor to the upperleft corner of the screen

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