by EVE NORTH
(BOYNTON BEACH, FLORIDA, USA)
The following matematical question involves the use of a vertical line (|) ; i.e. a line lying north to south as contrasted with a minus sign ( - ) which goes east to west.
You should note that the vertical line to which I am referring appears on a computer keyboard below the Backspace key.
The question is: Which of the following exprfesions is true?
- |5| = 5
| -1/3 | = 1/3
- | - 2 | = 2
- | 6 | = 6
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