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Permanent link to this puzzle: mscroggs.co.uk/puzzles/56

\(3\) and \(1.5\) are a special pair of numbers, as \(3+1.5=4.5\)
and
\(3\times 1.5=4.5\) so \(3+1.5=3\times 1.5\).

Given a number \(a\), can you find a number \(b\) such that
\(a+b=a\times b\)?

If you enjoyed this puzzle, check out Sunday Afternoon Maths LX,

puzzles about chalkdust crossnumber, or a random puzzle.

puzzles about chalkdust crossnumber, or a random puzzle.